[c-nsp] Etherchannel & 7507/5500 combo

[Steven Bertsch]

James,

I seem to remember reading something on TAC a while back about
an FEC hardware limitation on (possibly) the 5500.

It's possible that your ports need to be on the same module or
even starting at a specific port number in series for the FEC to work.

At 12:19 PM 5/10/2005, James Saker wrote:
>Seems like I'm missing something simple on my Etherchannel implementation
>between a 7507 and a Catalyst 5500. I've worked thru the Cisco LAN Switching
>section on Etherchannel and various cisco.com documents and configurations,
>but appear to be overlooking something.
>
>My configuration is a 7507 with a 100BASETX and 100BASEFX port that connect
>to the 5500 (fa1/0/0 and fa4/1/0 respectively). The 5500 has a TX and FX
>blade, with the FX connection on 4/1 and the TX on 7/1.
>
>The objective of the etherchannel config is to provide the 7507 with 200
>Mbps of aggregate capacity for VLAN trunking out via the 5500. MPLS is also
>expected to be carried across the 5500 to remote routers, originating from
>the 7507. FX and TX combination is for slot diversity on both the 7507 and
>the 5500.
>
>I've set up the 7507 in what should be a textbook config, creating the port
>channel interface first and then bringing the physical interfaces into
>membership:
>
>interface Port-channel1
>  no ip address
>  full-duplex
>  tag-switching ip
>  hold-queue 150 in
>!
>interface FastEthernet1/1/0
>  no ip address
>  no ip redirects
>  no ip proxy-arp
>  full-duplex
>  # note: no tag-switching IP here as it's defined on port channel, correct?
>  fair-queue
>  channel-group 1
>!
>interface FastEthernet4/1/0
>  no ip address
>  no ip redirects
>  no ip proxy-arp
>  full-duplex
>  fair-queue
>  channel-group 1
>!
>
>show int port-channel 1 looks normal:
>
>router1#show interfaces port-channel 1
>Port-channel1 is up, line protocol is up
>   Hardware is FEChannel, address is 00d0.bc6a.a028 (bia 0000.0000.0000)
>   MTU 1500 bytes, BW 200000 Kbit, DLY 100 usec,
>      reliability 255/255, txload 1/255, rxload 1/255
>   Encapsulation ARPA, loopback not set
>   Keepalive set (10 sec)
>   ARP type: ARPA, ARP Timeout 04:00:00
>     No. of active members in this channel: 2
>         Member 0 : FastEthernet1/1/0 , Full-duplex, 100Mb/s
>         Member 1 : FastEthernet4/1/0 , Full-duplex, 100Mb/s
>
>So I'm guessing my problem is on the 5500, which claims no ports are
>channeling. Configuration is as follows:
>
>#frame distribution method
>set port channel all distribution mac both
>#mls
>set mls disable ip
>set mls nde disable
>!
>#port channel
>set port channel 7/1 1
>set port channel 4/2 19
>set port channel 4/1 37
>!
># default port status is enable
>!
>!
>#module 1 : 0-port Supervisor III
>!
>#module 4 : 12-port 100BaseFX MM Ethernet
>set vlan 101  4/1
>set port duplex     4/1  full
>set trunk 4/1  on dot1q 1-1005
>set port channel 4/1 mode on
>set port channel 4/2 mode desirable silent
>!
>#module 7 : 24-port 10/100BaseTX Ethernet
>set vlan 2    7/3
>set vlan 3    7/2
>set vlan 4    7/4
>set vlan 101  7/1
>set vlan 1    7/24
>set port speed      7/1  100
>set port duplex     7/1  full
>set port broadcast  7/1   75.00%
>set trunk 7/1  on dot1q 1-1005
>set spantree portfast    7/1 enable
>set port channel 7/1 mode on
>!
>
>
>I'm guessing I'm overlooking something - having reviewed the config examples
>and experimented quite a bit. Any thoughts?
>
>Jamie
>
>Sr. Network Engineer
>American Relay Company
>
>
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Regards,
_______________________________________________________________
Steven Bertsch, System Administrator    Infinity AccessNET
sbertsch at iaxs.net                       Voice 952/944-7123 x161
http://www.iaxs.net/                    Fax   952/944-0115
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