Hi, On a 3700 cisco router i got t 1

[ogulcan]

Hi,
On a 3700 cisco router i got the following configuration on ethernet;

interface FastEthernet0/0
no ip address
no ip route-cache
no ip mroute-cache
duplex auto
speed auto
!
interface FastEthernet0/0.1
encapsulation dot1Q 10
ip address 10.1.222.1 255.255.255.248
ip access-group 105 in
ip accounting access-violations
no ip route-cache
no ip mroute-cache
!
interface FastEthernet0/0.2
encapsulation dot1Q 2
ip address 1.4.52.1 255.255.255.0
no ip route-cache
no ip mroute-cache

Now ,the problem is when i try to see the bandwidths of each interface i see the following thing that i couldn't understand:

router_3700#sh interface FastEthernet0/0.2
FastEthernet0/0.2 is up, line protocol is up
Hardware is Gt96k FE, address is 000b.bec3.8cd0 (bia 000b.bec3.8cd0)
Internet address is 2.16.128.1/24
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation 802.1Q Virtual LAN, Vlan ID 2.
ARP type: ARPA, ARP Timeout 04:00:00

router_3700#sh interface FastEthernet0/0.1
FastEthernet0/0.1 is up, line protocol is up
Hardware is Gt96k FE, address is 000b.bec3.8cd0 (bia 000b.bec3.8cd0)
Description: SUBE
Internet address is 2.16.2.1/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation 802.1Q Virtual LAN, Vlan ID 1.
ARP type: ARPA, ARP Timeout 04:00:00

as you see at the second subinterface
BW 10000 Kbit
at the first subinterface
BW 100000 Kbit

why is this difference,both are attached to same port on a 10/100 switch?

thank you friends.

 

[jdel]

the first thing i noticed is that the speed and duplex are both set to auto. auto-negotiation works about as well as plug-n-play, which is to say it works for <bleep>.

it would appear then that one subinterface is auto-negotiating to 100 full, and the other to 10 half.

try hardcoding (on the switch and the router) to all 100 full.

 

[baddos]

Another tip would be to turn on &quot;ip route-cache&quot;. Although it's not related to your problem, it is definately a scalability problem.

 

[ogulcan]

jdel;

i did what you said exactly;
changed the speed manually ;100 the port connected the router,and the port of the router..but problem remains.

Allied Telesyn Ethernet Switch AT-8024GB - AT-S39 v3.2.0
<No System Name>
Login Privilege: Manager
Port Configuration

Configuring Ports 24
0 - Status ............ Forwarding
1 - Negotiation ....... Manual
2 - Speed ............. 0100
3 - Duplex ............ Full-Duplex
4 - Flow Control ...... None
M - MDI/MDIX Mode ..... MDIX
B - Broadcast Control . No Broadcast Control

X - Reset Port
R - Return to Previous Menu

Enter your selection?

----------------------------
interface FastEthernet0/0
no ip address
no ip route-cache
no ip mroute-cache
speed 100
full-duplex
----------------------------
sh int FastEthernet0/0.2
FastEthernet0/0.2 is up, line protocol is up
Hardware is Gt96k FE, address is 000b.bec3.8cd0 (bia 000b.bec3.8cd0)
Internet address is 2.16.128.1/24
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation 802.1Q Virtual LAN, Vlan ID 2.
ARP type: ARPA, ARP Timeout 04:00:00
---------------------------------

 

[baddos]

What does the show interface fa0/0 show? Whatever the line speed on that, is the real line speed. The line speed on a virtual interface (fa0/0.2) is the same as the physical interface (fa0/0). The router might be identifing the virtual interface as bandwidth 10mb to show a lower priority to any routing protocols you might be running.

 

[ogulcan]

Hi baddos,
the output of &quot;show int fast 0/0 &quot; command is as following,it is 100 000 kbit actually..
And about the priority,i got some other routers configured like the mentioned above but their bandwiths are 100 000 kbs not 10 000 kbs. What i try to say is that ,if there were a prioritization by changing the bandwidths values on subinterface so why not at all routers?and because of this fact what i fear is that the subinterface is communicating at what it actually shows..i mean 10000k...but why?i dont know and no one knows...i talked about this issue over 15 networker but no one has a certain idea including me...is this a bug?

sh int fast 0/0
FastEthernet0/0 is up, line protocol is up
Hardware is Gt96k FE, address is 000b.bec3.8cd0 (bia 000b.bec3.8cd0)
MTU 1500 bytes, BW 100000 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 &quot;show interface&quot; counters 1w1d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue :0/40 (size/max)
5 minute input rate 1000 bits/sec, 1 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
2950883 packets input, 500591607 bytes
Received 534126 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
2743630 packets output, 1830272015 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out

 

[baddos]

Have you tried issuing a &quot;bandwidth 100000000&quot; command for the subinterface?

 

[ogulcan]

baddos thank youit worked.i did not try it...have a good day.