Bottleneck on 1721 over 1Mb

richdthomas · Jul 31, 2009

Hi,

Our ISP is now providing over 1Mb download speed and the Cisco 1721 router I have between our cable modem and LAN switch is being a bottleneck, so we can't benefit from the increased speed.

When I connected my laptop directly to the cable modem, I got a 5Mb download and 0.5Mb upload.

When put the router between my laptop and the cable modem, I got a 0.7Mb download and 0.4Mb upload.

I've tried the "ip route-cache" "ip route-cache same-interface" "ip route-cache flow" "ip cef" commands, one at a time on both the inside and outside interfaces and can't get any more throughput.

Below is a censored copy of my router's config and various diagnostic commands that I ran during my speedtests.

Does anyone have any ideas as to why my throughput is so slow or what I can do to improve it please? Any advice would be much appreciated. Thanks in advance.

Code:

1721#show run
Building configuration...

Current configuration : 7965 bytes
!
version 12.4
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname 1721
!
boot-start-marker
boot system flash flash:c1700-y-mz.124-8a.bin
boot-end-marker
!
logging buffered 51200 debugging
logging console critical
enable secret 5 ###########################
!
no aaa new-model
!
resource policy
!
!
!
no ip dhcp use vrf connected
no ip dhcp conflict logging
ip dhcp excluded-address 192.168.1.0 192.168.1.1
!
ip dhcp pool rich_laptop_work_wired
   host 192.168.1.30 255.255.255.0
   client-identifier 0100.0e7b.b453.dd
   client-name rich_laptop_work_wired
!
ip dhcp pool shuttle
   host 192.168.1.10 255.255.255.0
   client-identifier 0100.0dff.010b.63
   client-name shuttle
!
ip dhcp pool rich-desktop
   host 192.168.1.20 255.255.255.0
   client-identifier 0100.1d92.aa07.b5
   client-name rich-desktop
!
ip dhcp pool pundit
   host 192.168.1.90 255.255.255.0
   client-identifier 0100.1731.be1e.3d
   client-name pundit
!
ip dhcp pool liz-laptop-wifi
   host 192.168.1.141 255.255.255.0
   client-identifier 0100.1e4c.7db3.43
   client-name liz-laptop-wifi
!
ip dhcp pool wii-wifi
   host 192.168.1.144 255.255.255.0
   client-identifier 0100.2147.9ffd.45
   client-name wii-wifi
!
ip dhcp pool rich-toshiba-wifi
   host 192.168.1.143 255.255.255.0
   client-identifier 0100.16b6.c3ea.48
   client-name rich-toshiba-wifi
!
ip dhcp pool rich-old-hp-wifi
   host 192.168.1.146 255.255.255.0
   client-identifier 0100.1279.58f8.33
   client-name rich-old-hp-wifi
!
ip dhcp pool pda-wifi
   host 192.168.1.142 255.255.255.0
   client-identifier 0100.1a6b.a585.00
   client-name pda-wifi
!
ip dhcp pool liz-ipod-touch
   host 192.168.1.148 255.255.255.0
   client-identifier 0100.2436.d385.0a
   client-name liz-ipod-touch
!
ip dhcp pool rich-dell-wifi
   host 192.168.1.147 255.255.255.0
   client-identifier 0100.22fb.08d7.6e
   client-name rich-dell-wifi
!
ip dhcp pool rich-new-hp-wifi
   host 192.168.1.149 255.255.255.0
   client-identifier 0100.1302.36b6.a4
   client-name rich-new-hp-wifi
!
ip dhcp pool liz-sony-walkman-wifi
   host 192.168.1.150 255.255.255.0
   client-identifier 0100.21e8.8079.24
   client-name liz-sony-walkman-wifi
!
ip dhcp pool rich-nokia-wifi
   host 192.168.1.145 255.255.255.0
   client-identifier 0100.22fc.d154.44
   client-name rich-nokia-wifi
!
ip dhcp pool home
   network 192.168.1.0 255.255.255.0
   domain-name home.loc
   default-router 192.168.1.1
   dns-server 194.168.8.100 194.168.4.100 158.43.192.1
!
!
ip cef
!
!
!
!
interface Ethernet0
 description External interface to cable modem
 bandwidth 2000
 ip address dhcp
 ip access-group 101 in
 no ip proxy-arp
 ip nat outside
 no ip virtual-reassembly
 no ip route-cache cef
 no ip route-cache
 full-duplex
 no cdp enable
 hold-queue 100 out
!
interface FastEthernet0
 description Internal interface to hub for LAN
 bandwidth 10000
 ip address 192.168.1.1 255.255.255.0
 ip access-group 111 out
 no ip proxy-arp
 ip nat inside
 no ip virtual-reassembly
 no ip route-cache cef
 no ip route-cache
 speed 100
 full-duplex
 hold-queue 100 out
!
no ip http server
!
ip nat inside source list 1 interface Ethernet0 overload
ip nat inside source static tcp 192.168.1.10 3389 interface Ethernet0 3389
ip nat inside source static tcp 192.168.1.10 6346 interface Ethernet0 6346
ip nat inside source static udp 192.168.1.10 6346 interface Ethernet0 6346
ip nat inside source static tcp 192.168.1.10 9024 interface Ethernet0 9024
ip nat inside source static tcp 192.168.1.10 20699 interface Ethernet0 20699
ip nat inside source static tcp 192.168.1.15 22 interface Ethernet0 1863
!
access-list 1 permit any
access-list 101 remark ==Incoming from Cable modem to Ethernet0==
access-list 101 remark Next line is to allow return TCP packets back in
access-list 101 permit tcp any any range 0 65535 established
access-list 101 remark Next line is to allow RDP in from PX02 at work
access-list 101 permit tcp host ##.##.##.## any eq 3389
access-list 101 remark Next line is to allow RDP in from Mum and Dad's IP
access-list 101 permit tcp host ##.##.##.## any eq 3389
access-list 101 remark Next line is to allow ssh access to CentOS appliance on p
access-list 101 permit tcp host ##.##.##.## any eq 1863 log
access-list 101 remark Next line is to allow P2P TCP port
access-list 101 permit tcp any any eq 6346
access-list 101 remark Next line is to allow Soulseek TCP port
access-list 101 permit tcp any any eq 20699
access-list 101 remark Next line is to allow streaming in
access-list 101 permit tcp any any eq 9024 log
access-list 101 remark Next line is to deny all other TCP traffic
access-list 101 deny   tcp any any range 0 65535 log
access-list 101 remark Next 3 lines is to let DNS return packets back in
access-list 101 permit udp host 194.168.8.100 eq domain any
access-list 101 permit udp host 194.168.4.100 eq domain any
access-list 101 permit udp host 158.43.192.1 eq domain any
access-list 101 remark Next 6 lines is to let Nintendo UDP packets in
access-list 101 permit udp host 207.38.8.130 range 0 65535 any log
access-list 101 permit udp host 207.38.8.132 range 0 65535 any log
access-list 101 permit udp host 207.38.11.34 range 0 65535 any log
access-list 101 permit udp host 207.38.11.41 range 0 65535 any log
access-list 101 permit udp host 207.38.11.42 range 0 65535 any log
access-list 101 permit udp host 207.38.11.43 range 0 65535 any log
access-list 101 permit udp any any range 32768 61000 log
access-list 101 remark Next line is to let DHCP from ISP to router in
access-list 101 permit udp any eq bootps any
access-list 101 remark Next line is to allow P2P UDP port
access-list 101 permit udp any any eq 6346
access-list 101 remark Next line is to deny all other UDP traffic
access-list 101 deny   udp any any range 0 65535 log
access-list 101 remark Next line is to allow IPSec VPN traffic
access-list 101 permit gre any any
access-list 101 remark Next line is to allow ping in from PX02 at work
access-list 101 permit icmp host 194.202.186.177 any echo
access-list 101 remark Next 3 lines is to allow and deny the relevant ICMP packets
access-list 101 permit icmp any any echo-reply
access-list 101 permit icmp any any ttl-exceeded
access-list 101 permit icmp any any unreachable
access-list 101 remark Next line is to let Nintendo ICMP packets in
access-list 101 permit icmp host 207.38.8.130 any log
access-list 101 permit icmp host 207.38.8.132 any log
access-list 101 deny   icmp any any log
access-list 101 remark Next line denies everything else
access-list 101 deny   ip any any log
access-list 111 remark Next 3 lines is to let DNS return packets back in
access-list 111 permit udp host 194.168.8.100 eq domain any
access-list 111 permit udp host 192.168.4.100 eq domain any
access-list 111 permit udp host 158.43.192.1 eq domain any
access-list 111 remark Next 5 lines is to let Nintendo UDP packets in
access-list 111 permit udp host 207.38.11.34 eq 27900 host 192.168.1.44 range 32768 61000 log
access-list 111 permit udp host 207.38.11.41 eq 27901 host 192.168.1.44 range 32768 61000 log
access-list 111 permit udp host 207.38.11.42 eq 27901 host 192.168.1.44 range 32768 61000 log
access-list 111 permit udp host 207.38.11.43 eq 27901 host 192.168.1.44 range 32768 61000 log
access-list 111 permit udp any host 192.168.1.44 range 32768 61000 log
access-list 111 remark Next line is to let DHCP from ISP to router in
access-list 111 permit udp any eq bootps any
access-list 111 remark Next line is to allow P2P UDP port
access-list 111 permit udp any any eq 6346
access-list 111 remark Next line is to deny all other UDP traffic
access-list 111 deny   udp any any range 0 65535 log
access-list 111 permit ip any any
snmp-server community ############# RW
snmp-server community ####### RO
!
control-plane
!
banner motd ^C1721 Router^C
!
line con 0
 password #########
 logging synchronous
 login
line aux 0
line vty 0 4
 password #########
 logging synchronous
 login
!
end

1721#







1721#show proc cpu
CPU utilization for five seconds: 11%/2%; one minute: 8%; five minutes: 4%
 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
   1          24        10       2400  0.00%  0.00%  0.00%   0 Chunk Manager
   2           4       199         20  0.00%  0.00%  0.00%   0 Load Meter
   4        1124       117       9606  0.00%  0.10%  0.09%   0 Check heaps
   5           0         1          0  0.00%  0.00%  0.00%   0 Pool Manager
   6           0         2          0  0.00%  0.00%  0.00%   0 Timers
   7           0         2          0  0.00%  0.00%  0.00%   0 Serial Backgroun
   8           0         2          0  0.00%  0.00%  0.00%   0 AAA high-capacit
   9           0         1          0  0.00%  0.00%  0.00%   0 AAA_SERVER_DEADT
  10           0         1          0  0.00%  0.00%  0.00%   0 Policy Manager
  11           0         1          0  0.00%  0.00%  0.00%   0 Crash writer
  12           0         1          0  0.00%  0.00%  0.00%   0 RO Notify Timers
  13          16        57        280  0.00%  0.00%  0.00%   0 ARP Input
  14           0         2          0  0.00%  0.00%  0.00%   0 DDR Timers
  15           0       101          0  0.00%  0.00%  0.00%   0 HC Counter Timer
  16          12         2       6000  0.00%  0.00%  0.00%   0 Entity MIB API
  17          40        31       1290  0.00%  0.00%  0.00%   0 EEM ED Syslog
  18           0         2          0  0.00%  0.00%  0.00%   0 SMART
  19           0         1          0  0.00%  0.00%  0.00%   0 SERIAL A'detect
  20           0       990          0  0.00%  0.00%  0.00%   0 GraphIt
  21           0         2          0  0.00%  0.00%  0.00%   0 Dialer event
  22           0         2          0  0.00%  0.00%  0.00%   0 XML Proxy Client
  23           0         1          0  0.00%  0.00%  0.00%   0 Critical Bkgnd
  24           8       421         19  0.00%  0.00%  0.00%   0 Net Background
  25           0         3          0  0.00%  0.00%  0.00%   0 IDB Work
  26           4        49         81  0.00%  0.00%  0.00%   0 Logger
  27           0       985          0  0.00%  0.00%  0.00%   0 TTY Background
  28           0      1006          0  0.00%  0.00%  0.00%   0 Per-Second Jobs
  29           0         9          0  0.00%  0.00%  0.00%   0 DHCPD Timer
  30           0         1          0  0.00%  0.00%  0.00%   0 AggMgr Process
  31           0         1          0  0.00%  0.00%  0.00%   0 dev_device_inser
  32           4         1       4000  0.00%  0.00%  0.00%   0 dev_device_remov
  33           0         2          0  0.00%  0.00%  0.00%   0 ESWPPM
  34           0         1          0  0.00%  0.00%  0.00%   0 Net Input
  35           0       200          0  0.00%  0.00%  0.00%   0 Compute load avg
  36         476        17      28000  0.00%  0.02%  0.00%   0 Per-minute Jobs
  37           8         2       4000  0.00%  0.00%  0.00%   0 AAA Server
  38           0         1          0  0.00%  0.00%  0.00%   0 AAA ACCT Proc
  39           0         1          0  0.00%  0.00%  0.00%   0 ACCT Periodic Pr
  40           0         2          0  0.00%  0.00%  0.00%   0 AAA Dictionary R
  41       15620     14980       1042  6.63%  4.28%  2.13%   0 IP Input
  42           0         1          0  0.00%  0.00%  0.00%   0 ICMP event handl
  43           0       106          0  0.00%  0.00%  0.00%   0 CDP Protocol
  44        5148      5704        902  2.21%  2.25%  0.81%   6 Virtual Exec
  45           0         1          0  0.00%  0.00%  0.00%   0 SSS Manager
  46           0       135          0  0.00%  0.00%  0.00%   0 SSS Test Client
  47           0         1          0  0.00%  0.00%  0.00%   0 SSS Feature Mana
  48           8      3907          2  0.00%  0.00%  0.00%   0 SSS Feature Time
  49           0         3          0  0.00%  0.00%  0.00%   0 PPP Hooks
  50           0         1          0  0.00%  0.00%  0.00%   0 X.25 Encaps Mana
  51           0         2          0  0.00%  0.00%  0.00%   0 DTP Protocol
  52           4         2       2000  0.00%  0.00%  0.00%   0 PPP IP Route
  53           0         2          0  0.00%  0.00%  0.00%   0 PPP IPCP
  54          72      1983         36  0.00%  0.00%  0.00%   0 DHCPD Receive
  55          20        49        408  0.00%  0.00%  0.00%   0 IP Background
  56          16        27        592  0.00%  0.00%  0.00%   0 IP RIB Update
  57          32       385         83  0.00%  0.01%  0.00%   0 TCP Timer
  58           4         3       1333  0.00%  0.00%  0.00%   0 TCP Protocols
  59           0         1          0  0.00%  0.00%  0.00%   0 IP Traceroute
  60           0         1          0  0.00%  0.00%  0.00%   0 RARP Input
  61           4       989          4  0.00%  0.00%  0.00%   0 Socket Timers
  62           0         5          0  0.00%  0.00%  0.00%   0 HTTP CORE
  63           0        17          0  0.00%  0.00%  0.00%   0 IP Cache Ager
  64           0         1          0  0.00%  0.00%  0.00%   0 PAD InCall
  65           0         2          0  0.00%  0.00%  0.00%   0 X.25 Background
  66           0         2          0  0.00%  0.00%  0.00%   0 PPP SSS
  67           0        18          0  0.00%  0.00%  0.00%   0 Adj Manager
  68          40      1321         30  0.00%  0.00%  0.00%   0 CEF process
  69           0         2          0  0.00%  0.00%  0.00%   0 PPP Bind
  70           0         2          0  0.00%  0.00%  0.00%   0 LOCAL AAA
  71           0         2          0  0.00%  0.00%  0.00%   0 ENABLE AAA
  72           0         2          0  0.00%  0.00%  0.00%   0 LINE AAA
  73           0         2          0  0.00%  0.00%  0.00%   0 TPLUS
  74           0         1          0  0.00%  0.00%  0.00%   0 Key chain liveke
  75           0        42          0  0.00%  0.00%  0.00%   0 CRM_CALL_UPDATE_
  76           0         1          0  0.00%  0.00%  0.00%   0 EM Background Pr
  77           0         2          0  0.00%  0.00%  0.00%   0 AAA SEND STOP EV
  78           0         1          0  0.00%  0.00%  0.00%   0 Syslog Traps
  79           0         1          0  0.00%  0.00%  0.00%   0 PM Callback
  80           4         3       1333  0.00%  0.00%  0.00%   0 EEM ED CLI
  81           4         2       2000  0.00%  0.00%  0.00%   0 EEM ED Counter
  82           0         2          0  0.00%  0.00%  0.00%   0 EEM ED Interface
  83           0         3          0  0.00%  0.00%  0.00%   0 EEM ED IOSWD
  84           0         2          0  0.00%  0.00%  0.00%   0 EEM ED Memory-th
  85           4         2       2000  0.00%  0.00%  0.00%   0 EEM ED None
  86           0         2          0  0.00%  0.00%  0.00%   0 EM ED OIR
  87           0         2          0  0.00%  0.00%  0.00%   0 EEM ED SNMP
  88           0        18          0  0.00%  0.00%  0.00%   0 EEM ED Timer
  89           8       216         37  0.00%  0.00%  0.00%   0 EEM Server
  90           4        25        160  0.00%  0.00%  0.00%   0 Syslog
  91           8         2       4000  0.00%  0.00%  0.00%   0 VLAN Manager
  92           0         2          0  0.00%  0.00%  0.00%   0 EEM Policy Direc
  94          28      1116         25  0.00%  0.00%  0.00%   0 DHCP Client
  96          16      1930          8  0.00%  0.00%  0.00%   0 IP NAT Ager
  97           0         1          0  0.00%  0.00%  0.00%   0 IP NAT WLAN
  98           0         1          0  0.00%  0.00%  0.00%   0 IP VFR proc
  99           8        35        228  0.00%  0.00%  0.00%   0 CEF Scanner
 100           0         2          0  0.00%  0.00%  0.00%   0 SNMP Timers
 101           8        14        571  0.00%  0.00%  0.00%   0 IP SNMP
 102           4         7        571  0.00%  0.00%  0.00%   0 PDU DISPATCHER
 103          40         7       5714  0.00%  0.00%  0.00%   0 SNMP ENGINE
 104           0         1          0  0.00%  0.00%  0.00%   0 SNMP ConfCopyPro
 105           0         1          0  0.00%  0.00%  0.00%   0 SNMP Traps
 106         268      2383        112  0.00%  0.01%  0.00%   0 NAT MIB Helper
 107           0        22          0  0.00%  0.00%  0.00%   0 DHCPD Database

1721#show memory summary
                Head    Total(b)     Used(b)     Free(b)   Lowest(b)  Largest(b)
Processor   81607F24    61462300    12031712    49430588    49254012    47197164
      I/O    5060C00    16380928     1500840    14880088    14880088    14880060

1721#show interfaces stat
Ethernet0
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor      13305   12344283       8665    3697870
             Route cache         13       1841          0          0
                   Total      13318   12346124       8665    3697870
FastEthernet0
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor       9237    3733409      13535   12464273
             Route cache          0          0          0          0
                   Total       9237    3733409      13535   12464273
NVI0
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor          0          0          0          0
             Route cache          0          0          0          0
                   Total          0          0          0          0
1721#

1721#show interfaces switching
Ethernet0 External interface to cable modem
          Throttle count          0
                   Drops         RP          0         SP          0
             SPD Flushes       Fast          0        SSE          0
             SPD Aggress       Fast          0
            SPD Priority     Inputs          2      Drops          0

    Protocol  IP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process      14934   13941989       9823    4594949
            Cache misses         33          -          -          -
                    Fast         13       1841          0          0
               Auton/SSE          0          0          0          0

    Protocol  ARP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          2        120          3        180
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    Protocol  Other
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          0          0        134       8040
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    NOTE: all counts are cumulative and reset only after a reload.
FastEthernet0 Internal interface to hub for LAN
          Throttle count          0
                   Drops         RP          0         SP          0
             SPD Flushes       Fast          0        SSE          0
             SPD Aggress       Fast          0
            SPD Priority     Inputs         25      Drops          0

    Protocol  IP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process      10566    4640908      14993   14139344
            Cache misses          1          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    Protocol  ARP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process         25       1500        108       6480
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    Protocol  CDP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          0          0         32      10425
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    Protocol  Other
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          0          0        133       7980
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

    NOTE: all counts are cumulative and reset only after a reload.
NVI0

    All statistics for this interface are zero.
1721#

unclerico · Jul 31, 2009

well as it is now you are process switching everything. the 1721 using process switching pushes about 850kbps. the 1721 with fast switching/CEF pushes about 6Mbps. re-enable CEF on the interfaces and then post the output of sh int e0 and sh int f0. you may have a speed/duplex mismatch on the interface connecting the router to the modem.

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

justvistin · Jul 31, 2009

You appear to have a Virgin Media Cable Modem. Is the Cisco 1721 router being assigned a public IP addres or a private IP address ?

richdthomas · Jul 31, 2009

Hi unclerico,

Thanks for your reply.

I've issued the "ip cef" command in the global configuration and both LAN interfaces.

I've put the output of the show commands below.

I then read your bit about the speed/duplex mismatch, so I did a no full-duplex and I'm now up to a 6Mb download speed

I'm really chuffed with this, thank you very much.
I never dreampt that the cable modem would be operating in half-duplex mode and had always nailed the router's outside LAN interface to full duplex.
Are there other settings I can try to get it up to 10Mb?

justvistin, I do have this connected to a Virgin Media Internet Cable Modem. The cable modem is assigning my outside LAN interface with a public IP address.

Code:

1721#show interfaces ethernet 0
Ethernet0 is up, line protocol is up
  Hardware is PQUICC Ethernet, address is 0004.dd0c.ea19 (bia 0004.dd0c.ea19)
  Description: External interface to cable modem
  Internet address is ##.##.##.##/22
  MTU 1500 bytes, BW 2000 Kbit, DLY 1000 usec,
     reliability 255/255, txload 2/255, rxload 10/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 10BaseT
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:02, output 00:00:02, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/100 (size/max)
  5 minute input rate 79000 bits/sec, 3 packets/sec
  5 minute output rate 23000 bits/sec, 2 packets/sec
     96647 packets input, 85869525 bytes, 0 no buffer
     Received 1082 broadcasts, 0 runts, 1 giants, 0 throttles
     5414 input errors, 2405 CRC, 3008 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     81270 packets output, 20973548 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
1721#
1721#show interfaces fast 0
FastEthernet0 is up, line protocol is up
  Hardware is PQUICC_FEC, address is 000c.851f.b836 (bia 000c.851f.b836)
  Description: Internal interface to hub for LAN
  Internet address is 192.168.1.1/24
  MTU 1500 bytes, BW 10000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/100 (size/max)
  5 minute input rate 18000 bits/sec, 3 packets/sec
  5 minute output rate 67000 bits/sec, 3 packets/sec
     83441 packets input, 21155226 bytes
     Received 697 broadcasts, 0 runts, 0 giants, 0 throttles
     28 input errors, 28 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     100667 packets output, 86029808 bytes, 0 underruns
     0 output errors, 0 collisions, 3 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
1721#

burtsbees · Jul 31, 2009

Why so many dhcp pools all in the same subnet???

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

burtsbees · Jul 31, 2009

Also, your bottleneck is e0, which you have set at 2MB...

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

unclerico · Jul 31, 2009

I never dreampt that the cable modem would be operating in half-duplex mode and had always nailed the router's outside LAN interface to full duplex.

the rule of thumb is that if you hard code one side you MUST hardcode the other. if you don't then autonegotiation may or may not work properly

Are there other settings I can try to get it up to 10Mb?

that's the thing, the 1721 can only do roughly 6Mbps so there is nothing more that you can do with the current hardware

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

richdthomas · Aug 1, 2009

Hi burtsbees,

I have set up a DHCP pool per IP address, as it was my way to issue a specific IP addresses to a specific MAC address. I don't know if there is a better way of doing this.

The "bandwidth 2000" configuration on my outside interface is only used for reporting/measuring the utilisation of an interface. I have set this to 10000 now, as it's best to set it to what it can provide, so that I can get correct reporting/measuring utilisation figures from the router.

richdthomas · Aug 1, 2009

Hi unclerico,

Thanks for that, I'll keep the autonegotiation rule of thumb in mind.

Would a Cisco PIX 501 be able to pass traffic faster then 6Mbps.

Many thanks for all your help, much appreciated

Richard.

burtsbees · Aug 1, 2009

When you set the bw manually, that is what you are limited to. You can set a fastethernet interface to 1000Kbps, and you cannot get more than 1Mb through. The bandwidth that you set is what you get. It does not do what you think it does...

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

unclerico · Aug 1, 2009

Would a Cisco PIX 501 be able to pass traffic faster then 6Mbps.

yes it will.

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

richdthomas · Aug 2, 2009

Hi burtsbees,

I wouldn't normally discuss this further, as I've changed the setting, happy with the result but I want to reach an agreement on the bandwidth command so that any one else reading this thread isn't mislead.

I've read a few articles

http://puck.nether.net/pipermail/cisco-nas/2005-June/001121.html

and

http://www.zdnetasia.com/insight/network/0,39044847,39375724,00.htm

and they both explain that the bandwidth command does not control the amount of bandwidth the interface has.

I'm not trying to prove you wrong, I just wanted less people to have this misunderstanding about the bandwidth command.

I'm sure it's a typical CCNA question too.

richdthomas · Aug 2, 2009

Hi unclerico,

Thanks for confirming this, that'll be my next move.

Thank you for your help.

burtsbees · Aug 2, 2009

You're right. I could swear I did a lab on an asynch interface where I messed with the bandwidth speed and it went down to exactly that. I had a web server and my WAN was on a WIC-1T. When I did
band 10
The cartoon I had playing went really choppy. I did the no form, and bam---it came back.

CRAP---no...that was clock rate...NEVERMIND!

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

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Bottleneck on 1721 over 1Mb

richdthomas

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unclerico

IS-IT--Management

justvistin

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richdthomas

Programmer

burtsbees

Programmer

burtsbees

Programmer

unclerico

IS-IT--Management

richdthomas

Programmer

richdthomas

Programmer

burtsbees

Programmer

unclerico

IS-IT--Management

richdthomas

Programmer

richdthomas

Programmer

burtsbees

Programmer

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