Cisco 1601 + Serial Int + Bandwidth

[madmondeoman]

I have managed to get 2 offices connected via a 1Mb leased line. When transferring files across the link is appears that it is only using a 512 link. BT says it installed a 1Mb line. If this is so have I missed anything on the config side. Any ideas or suggestions.

Thanks

Shaun

home@shaundavies.com

 

[routerman]

Shaun,

How did you establish that the link is running at 512k?
What sort of file transfer are you using, FTP or TFTP?

Its not possible to tell from the router what speed the routers interface is being clocked at, you would need to measure it with a counter or data scope, or accept BT's word for it.

Do you have any form of traffic shaping applied to the interface, if unsure post the show run for the interface.

 

[ChrisAC]

What did you set the clockrate at on the DCE end?

Chris.


**********************
Chris Andrew, CCNA, CCSA
chris@iproute.co.uk
**********************

 

[madmondeoman]

I used Cisco's Fast Step Setup program to configure both routers. We copied a file across and timed it. Using the monitor program the bandwidth was at 100% utilisation.
BT installed teh NTU and we just connected the routers to them. How do I know about the clock speed, is that on router on or the NTU??
Thanks
Shaun

 

[routerman]

The clock rate command is used if you are connecting the routers back to back across a cross over type serial interface.

In your case the NTU supplies the clock at both ends, thats set by the provider.

If you use FTP then the client gives a value for the transfer rate, usually in bytes per second.

I would use the `show interface serial n/n' command to look at the bit rate during transfer, also there is a counter there that indicates utilisation.


Is there a bandwidth command set on the interface? An snmp based monitor reads that value and uses it for its calculations. If there is no bandwidth setting it defaults to 1.544 Mbps.

 

[gconnect]

what type of link is this? frame-relay, fractional t1, dsl?

if your utilization is actually at 100% when transferring 1 file then something is wrong, when transferring the file what is the output of?:

show buffers
show interface (look at the txload and rxload parts)

if you are using frame-relay
on frame-relay links when doing a 'show interface' you will see an effective bandwidth statement about in the middle of the show interface command

 

[jeter]

copy the configs to the post. This is needes as we do not know what application you are using. IE frame-relay, point-to-point etc.

if this is a point to point clocking must be set at one end for network ( this is default)
second router internal clocking (DTE, DTC). Please advise.

“Reserve your right to think, for even to think wrongly is better than not to think at all”

Fisher CCNA, Network+

 

[madmondeoman]

Hi Guys

Been back to the site and got the configs.

Its a 1Mb connection between the 2 sites.

!
service timestamps debug uptime
service timestamps log uptime
service password-encryption
no service tcp-small-servers
no service udp-small-servers
!
hostname *******
!
enable password enable
!
no ip name-server
!
ip subnet-zero
no ip domain-lookup
ip routing
!
interface Ethernet 0
no shutdown
description connected to ****** 192.168.*.*
ip address 192.168.*.* 255.255.255.0
no keepalive
!
interface Serial 0
no shutdown
description connected to *********
ip unnumbered Ethernet 0
encapsulation ppp
!
router rip
version 2
network 192.168.*.*
no auto-summary
!
!
ip classless
!
! IP Static Routes
ip route 0.0.0.0 0.0.0.0 Serial 0 1 permanent
no ip http server
snmp-server community public RO
snmp-server location ********
no snmp-server contact
!
line console 0
exec-timeout 0 0
password 439399
login
!
line vty 0 4
password 439399
login
!
end


I also have this

*******>show conf
^
% Invalid input detected at '^' marker.

dawlish_r>show con
QUICC Ethernet unit 0 using SCC1, Microcode ver 4
Current station address 0009.437f.2f99, default address 0009.437f.2f99
idb at 0x250034C, driver data structure at 0x24FDD9C
SCC Registers:
General [GSMR]=0x0:0x1088003C, Protocol-specific [PSMR]=0x80A
Events [SCCE]=0x0000, Mask [SCCM]=0x001F, Status [SCCS]=0x0002
Transmit on Demand [TODR]=0x0, Data Sync [DSR]=0xD555
Interrupt Registers:
Config [CICR]=0x00368461, Pending [CIPR]=0x0000C004
Mask [CIMR]=0xC8000012, In-srv [CISR]=0x00000000
Command register [CR]=0x6C0
Port A [PADIR]=0x0000, [PAPAR]=0xCCC3
[PAODR]=0x0000, [PADAT]=0x33FE
Port B [PBDIR]=0x00F13E, [PBPAR]=0x0010CE
[PBODR]=0x000000, [PBDAT]=0x0348DD
Port C [PCDIR]=0x000A, [PCPAR]=0x0000
[PCSO]=0x0830, [PCDAT]=0x03C4, [PCINT]=0x0000

SCC GENERAL PARAMETER RAM (at 0xFF00C00)
Rx BD Base [RBASE]=0x420, Fn Code [RFCR]=0x18
Tx BD Base [TBASE]=0x4A0, Fn Code [TFCR]=0x18
Max Rx Buff Len [MRBLR]=1520
Rx State [RSTATE]=0x18000000, BD Ptr [RBPTR]=0x438
Tx State [TSTATE]=0x18000AE3, BD Ptr [TBPTR]=0x4B0

SCC ETHERNET PARAMETER RAM (at 0xFF00C30)
CRC Preset [C_PRES]=0xFFFFFFFF, Mask [C_MASK]=0xDEBB20E3
Errors: CRC [CRCEC]=0, Alignment [ALEC]=0, Discards [DISFC]=0
PAD Char [PADS]=0x0
Retry Limit [RET_LIM]=15, Count [RET_CNT]=15
Frame Lengths: [MAXFLR]=1518, [MINFLR]=64
Max DMA Lengths: [MAXD1]=1518, [MAXD2]=1518
Group Address Filter [GADDRn]=0000:0000:0000:0100
Indiv Address Filter [IADDRn]=0000:0000:0000:0000
Physical Address [PADDR1]=992F.7F43.0900
Last Address Set in Filter [TADDR]=CCCC.CC0C.0001
Persistence [P_Per]=0, Backoff Cnt [BOFF_CNT]=0
BD Pointers:
First Rx [RFBD]=0x0, First Tx [TFBD]=0x4B0, Last Tx [TLBD]=0x4A8

RX ring with 16 entries at 0xFF00420, Buffer size 1524
Rxhead = 0xFF00448 (5), Rxp = 0x24FDDCC (5)
00 pak=0x2503300 buf=0x260B8C0 status=9000 pak_size=0
01 pak=0x2502AF0 buf=0x2609DD0 status=9000 pak_size=0
02 pak=0x2504524 buf=0x260F55C status=9000 pak_size=0
03 pak=0x250594C buf=0x26138B4 status=9000 pak_size=0
04 pak=0x2503D14 buf=0x260DA6C status=9000 pak_size=0
05 pak=0x2504728 buf=0x260FC18 status=9000 pak_size=0
06 pak=0x2504D34 buf=0x261104C status=9000 pak_size=0
07 pak=0x2505340 buf=0x2612480 status=9000 pak_size=0
08 pak=0x25026E8 buf=0x2609058 status=9000 pak_size=0
09 pak=0x2501ED8 buf=0x2607568 status=9000 pak_size=0
10 pak=0x250492C buf=0x26102D4 status=9000 pak_size=0
11 pak=0x2504F38 buf=0x2611708 status=9000 pak_size=0
12 pak=0x2505544 buf=0x2612B3C status=9000 pak_size=0
13 pak=0x25028EC buf=0x2609714 status=9000 pak_size=0
14 pak=0x2503F18 buf=0x260E128 status=9000 pak_size=0
15 pak=0x2503708 buf=0x260C638 status=B000 pak_size=0

TX ring with 4 entries at 0xFF004A0, tx_count = 0
tx_head = 0xFF004B0 (2), head_txp = 0x24FDE1C (2)
tx_tail = 0xFF004B0 (2), tail_txp = 0x24FDE1C (2)
00 pak=0x0000000 buf=0x0000000 status=0000 pak_size=0
01 pak=0x0000000 buf=0x0000000 status=0000 pak_size=0
02 pak=0x0000000 buf=0x0000000 status=0000 pak_size=0
03 pak=0x0000000 buf=0x0000000 status=2000 pak_size=0
0 missed datagrams, 0 overruns
0 transmitter underruns, 0 excessive collisions
1092 single collisions, 4049 multiple collisions
0 dma memory errors, 0 CRC errors

0 alignment errors, 0 runts, 0 giants
QUICC SCC specific errors:
0 buffer errors, 0 overflow errors
0 input aborts on late collisions
0 heartbeat failures, 0 cumulative deferred
0 throttles, 0 enables




QUICC Serial unit 0
idb at 0x2505D54, driver data structure at 0x25075C4
SCC Registers:
General [GSMR]=0x2:0x00000030, Protocol-specific [PSMR]=0x0
Events [SCCE]=0x0000, Mask [SCCM]=0x001F, Status [SCCS]=0x0006
Transmit on Demand [TODR]=0x0, Data Sync [DSR]=0x7E7E
Interrupt Registers:
Config [CICR]=0x00368461, Pending [CIPR]=0x0000C004
Mask [CIMR]=0xC8000012, In-srv [CISR]=0x00000000
Command register [CR]=0x6C0
Port A [PADIR]=0x0000, [PAPAR]=0xCCC3
[PAODR]=0x0000, [PADAT]=0xF7BE
Port B [PBDIR]=0x00F13E, [PBPAR]=0x0010CE
[PBODR]=0x000000, [PBDAT]=0x0348DD
Port C [PCDIR]=0x000A, [PCPAR]=0x0000
[PCSO]=0x0830, [PCDAT]=0x03C4, [PCINT]=0x0000
DTE V.11 (X.21) serial cable attached.

SCC GENERAL PARAMETER RAM (at 0xFF00F00)
Rx BD Base [RBASE]=0x560, Fn Code [RFCR]=0x18
Tx BD Base [TBASE]=0x5A0, Fn Code [TFCR]=0x18
Max Rx Buff Len [MRBLR]=1528
Rx State [RSTATE]=0x18008240, BD Ptr [RBPTR]=0x588
Tx State [TSTATE]=0x18000348, BD Ptr [TBPTR]=0x5A8

SCC HDLC PARAMETER RAM (at 0xFF00F38)
CRC Preset [C_PRES]=0xFFFF, Mask [C_MASK]=0xF0B8
Errors: CRC [CRCEC]=2943, Aborts [ABTSC]=2, Discards [DISFC]=0
Nonmatch Addr Cntr [NMARC]=0
Retry Count [RETRC]=0
Max Frame Length [MFLR]=1526
Rx Int Threshold [RFTHR]=0, Frame Cnt [RFCNT]=16963
User-defined Address 0000/0000/0000/0000
User-defined Address Mask 0x0000


buffer size 1524
BRGC1=101B0, BRGC2=0, BRGC3=0, BRGC4=0
modem_signal_addr FF01566
MASK: DSR=1, DTR=2,RTS=8.CTS=400,DCD=800
txbrgc=FF015FC, rxbrgc=FF015FC
BRG [DTE]: rx_sicr_clk=7, tx_sicr_clk=6
BRG [DCE]: rx_sicr_clk=7, tx_sicr_clk=3
CLK SRC: sync=4000, async=4000
RX ring with 8 entries at 0xFF00560, Buffer size 1524
Rxhead = 0xFF00588 (5), Rxp = 0x25075F4 (5)
00 pak=0x250D6C8 buf=0x261AB3C status=9000 pak_size=0
01 pak=0x250D0BC buf=0x2619708 status=9000 pak_size=0
02 pak=0x250CAB0 buf=0x26182D4 status=9000 pak_size=0
03 pak=0x250C6A8 buf=0x261755C status=9000 pak_size=0
04 pak=0x250D2C0 buf=0x2619DC4 status=9000 pak_size=0
05 pak=0x250C8AC buf=0x2617C18 status=9000 pak_size=0
06 pak=0x250CCB4 buf=0x2618990 status=9000 pak_size=0
07 pak=0x250C4A4 buf=0x2616EA0 status=B000 pak_size=0

TX ring with 2 entries at 0xFF005A0, tx_count = 0
tx_head = 0xFF005A8 (1), head_txp = 0x2507640 (1)
tx_tail = 0xFF005A8 (1), tail_txp = 0x2507640 (1)
00 pak=0x0000000 buf=0x0000000 status=0000 pak_size=0
01 pak=0x0000000 buf=0x0000000 status=2000 pak_size=0
QUICC SCC specific errors:
10124 input aborts on receiving flag sequence
0 throttles, 0 enables
0 overruns
0 transmitter underruns
0 transmitter CTS losts

*******>
*******>show int
Ethernet0 is up, line protocol is up
Hardware is QUICC Ethernet, address is 0009.437f.2f99 (bia 0009.437f.2f99)
Internet address is 192.168.*.*/24
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 255/255, load 1/255
Encapsulation ARPA, loopback not set, keepalive set (10 sec)
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:09, output 00:00:09, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
19799142 packets input, 3368704548 bytes, 0 no buffer
Received 705820 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 input packets with dribble condition detected
21117050 packets output, 3549346903 bytes, 0 underruns
0 output errors, 5141 collisions, 1 interface resets
0 babbles, 0 late collision, 22195 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Serial0 is up, line protocol is up
Hardware is QUICC Serial
Description: RCN
Interface is unnumbered. Using address of Ethernet0 (192.168.*.*)
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input 00:00:06, output 00:00:04, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0 (size/max/drops); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/4/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
21082158 packets input, 3284156140 bytes, 0 no buffer
Received 1245926 broadcasts, 0 runts, 0 giants, 0 throttles
51836 input errors, 3537 CRC, 38175 frame, 0 overrun, 0 ignored, 10124 abor
t
20343258 packets output, 3141995286 bytes, 0 underruns
0 output errors, 0 collisions, 1799 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up

*******>


There seems to be a lot of collisions which I presume is possibley the problem?

Thanks in advance

Shaun

 

[routerman]

Shaun,

Your serial interface is showing many errors, although the counters have never been cleard, so these have accumulated since your last power reset.

Try this:

Clear counters on all interfaces.

Run some traffic across the link, then check the serial and ethernet interfaces, look at the error counters, crc etc. You may have a problem with the serial link.

Also, do you really need to use PPP, if this is a point to point leased line you could use the default encapsulation, which is HDLC. However that wont fix a duff serial line.

 

[madmondeoman]

Hi Routerman

I have researched HDLC and PPP. From my understanding HDLC gives the opportunity of full duplex which would resolve the collision issue.
I have gone back through and am I right in thinking that if I change the last part of the config to

interface Serial 0
no shutdown
description connected to *******
ip unnumbered Ethernet 0
encapsulation hdlc
!
router rip
version 2
network 192.168.*.*
no auto-summary
!
!
ip classless
no ip http server
snmp-server community public RO
snmp-server location *******
no snmp-server contact
!
line console 0
exec-timeout 0 0
password ******
login
!
line vty 0 4
password ******
login
!
end

Would this be right, thanks
Shaun

 

[routerman]

Shaun,

The collisions are on the Ethernet port, the PPP encapsulation is on the serial port and has nothing to with collisions at all.

HDLC and PPP are both type of serial encapsulation, and both support full duplex operation.

Look at the serial line error counters, part of it posted here from your SH INT S0:

Serial0 is up, line protocol is up
21082158 packets input, 3284156140 bytes, 0 no buffer
Received 1245926 broadcasts, 0 runts, 0 giants, 0 throttles
51836 input errors, 3537 CRC, 38175 frame, 0 overrun, 0 ignored, 10124 abort
20343258 packets output, 3141995286 bytes

I think you want to investigate these first.

 

[HECLSUPPORT]

If possible check the Modem seting since speed needs to be defined on modem.

 

[madmondeoman]

Surely BT would set that for me. They installed the NTU's etc and we installed the routers. Is there anyway for me to check the settinsg on them???

Thanks

Shaun