Charlie_Boy

I have a cisco 2600 series router, it has 2 ethernet ports, i want to config these to run at a certain speed, does any know how to set the speed on these interfaces, i can run a #sh interfaces - cmd to see the interfaces, but can't see the speed they are running at. also is it true that only the fastethernet modules can run at 100mb/Full duplex.

SiCotty

What model is it. Only the 262x, 265x and any router with XM after it has 10/100 interfaces. The 261x only has 10MB interfaces.

Si

Chris L

By definition yes. A port that is capable of running at 100Mbps will be able to run at Full Duplex. Fast ethernet is 100 Mbs.

Chris

Charlie_Boy

not sure, at another site, do you know the cmd's to check the speed/duplex?

dsmith

do a "sh ip int brief" which will give a list of interfaces

10 meg only interfaces show as "Ethernet 0/0" or similair
100 meg Capable interfaces show as "FastEthernet 0/0" or similair

A "sh ver" should help identify the model.

if you then do "sh int fa0/0" it will tell you whether its full-duplex or not

Deano

dsmith

e.g.

router#sh ip int brief
Interface IP-Address OK? Method Status Prot
ocol
FastEthernet0/0 1.2.3.4 YES NVRAM up up

FastEthernet0/1 5.6.7.8 YES NVRAM up up

Ethernet1/0 1.1.1.1 YES NVRAM up up

Serial1/0 unassigned YES unset administratively down down

Ethernet1/1 unassigned YES NVRAM administratively down down

Loopback0 2.2.2.2 YES NVRAM up up

router#

router#sh int fa0/0
FastEthernet0/0 is up, line protocol is up
Hardware is AmdFE, address is 0004.9af3.31d0 (bia 0004.9af3.31d0)
Description: connection to a-catalyst po 4/2
Internet address is 1.2.3.4/24
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 "show interface" counters never
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 57000 bits/sec, 37 packets/sec
5 minute output rate 318000 bits/sec, 71 packets/sec
413553120 packets input, 28994277 bytes
Received 16842239 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
655536459 packets output, 117963222 bytes, 0 underruns
0 output errors, 0 collisions, 5 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
router#

Charlie_Boy

It's a 2611, i have tried the "sh int fa0/0" this doesn't work.

Charlie_Boy

Sorry for being a bit slow. The router only has ethernet ports not fastethernet ports, is there any way to check the duplex/speed settings and change if neccessary. otherwise what are the default settings for these.

Router#sh ip interface brief
Interface IP-Address OK? Method Status Protocol
Ethernet0/0 xxx.xxx.xxx.xxx YES NVRAM up up
BRI0/0 xxx.xxx.xxx.xxx YES NVRAM administratively down down
BRI0/0:1 unassigned YES unset administratively down down
BRI0/0:2 unassigned YES unset administratively down down
Ethernet0/1 xxx.xxx.xxx.xxx YES NVRAM up up

Router#sh interfaces
Ethernet0/0 is up, line protocol is up
Hardware is AmdP2, address is 0007.50bb.6240 (bia 0007.50bb.6240)
Description: line 80
Internet address is xxx.xxx.xxx.xxx/27
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 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 4w3d
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 3000 bits/sec, 1 packets/sec
5 minute output rate 54000 bits/sec, 2 packets/sec
9522342 packets input, 1629502136 bytes, 0 no buffer
Received 582299 broadcasts, 0 runts, 0 giants, 0 throttles
23657 input errors, 23657 CRC, 21516 frame, 0 overrun, 0 ignored, 0 abort
0 input packets with dribble condition detected
12995260 packets output, 3840312010 bytes, 1 underruns
708799 output errors, 73822 collisions, 708701 interface resets
0 babbles, 708753 late collision, 64916 deferred
45 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out

jason4656

if its just ethernet, then there is no need to check the speed, ethernet is 10mbps, fa is 100mbps, i think it presumes you know that?

You can try the ? in the interfaces menu to see the duplex commands?

dsmith

If its a 10 Mb.s only interface (e.g Ethernet 0/0), you can't set it to full-duplex. You're stuck with Half.

Deano

Charlie_Boy

Thanks everyone for your help. Though i have one more question, if i can. We have a 34mb internet connection, which is used by 4 parts of our company, going into 4 different ehternet interfaces, how is it possible to distribute bandwidth across the 4 interfaces, say 10mb 5mb and 2mb and son on.

dsmith

Apply "Commited Access Rates" or "CAR" to each interface.

e.g. (taken from live example)

interface FastEthernet1/0
description xxxx LAN - Rate Limited to 2 Mbps
ip address 1.2.3.4 255.255.255.240
ip access-group 180 in
no ip redirects
no ip directed-broadcast
rate-limit input 2000000 8000 16000 conform-action transmit exceed-action drop
rate-limit output 2000000 8000 16000 conform-action transmit exceed-action drop
full-duplex
standby 10 priority 105
standby 10 preempt
standby 10 ip 1.2.3.5
standby 10 track FastEthernet0/1

The 1st number is the speed in bits/sec you want. The 2nd and 3rd numbers are the excess and normal "burst sizes" allowed. Essentially the smaller these are the "harder" the limit will be. In fact too small and you'll struggle to reach your intended speed. There are no exact rules for calculating them (different people have differing views)

For the Speeds you mention I'd use

2Mb/s = 2000000 8000 16000 (as above - quite "generous" bursts)
5Mb/s = 5000000 10000 20000
10 mb/s = 10000000 16000 32000

Use the "sh int fa 0/0 rate-limit" command to view if excess traffic is being dropped etc.

Plenty of Docs on CCO - eg. This One

Deano

Charlie_Boy

Cheers Deano. Appreciated....