"ip tcp adjust-mss" on interface Port-Channel

Unanswered Question
Aug 20th, 2009

Hi Sir,

I have the following port channel config on a Cisco 7609:

!

interface Port-channel1

ip address 10.10.10.10 255.255.255.0

no ip redirects

no ip unreachables

no ip proxy-arp

ip ospf message-digest-key 1 md5 cisco123

logging event link-status

no mpls ldp igp sync

service-policy input POLICER

service-policy output POLICER

!

interface GigabitEthernet2/1

no ip address

no cdp enable

channel-protocol pagp

channel-group 1 mode desirable

!

interface GigabitEthernet2/6

no ip address

no cdp enable

channel-protocol pagp

channel-group 1 mode desirable

!

Module 2 is a WS-X6724-SFP.

I want to configure the "ip tcp adjust-mss" command on the interface. Please advise whether I should apply the command on the Port-Channel or the physical interfaces or both.

Thank you.

B.Rgds,

Lim TS

I have this problem too.
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Giuseppe Larosa Thu, 08/20/2009 - 02:01

Hello Lim,

you can configure a command regarding TCP OSI layer4 only on L3 interfaces so member links of the port channel don't need it.

You may need to consider a change on interface mtu and ip mtu.

Also I would consider if the command has to be given on the layer3 interface on the client Vlan.

It is likely that th bundle is a core facing link.

So it may be the wrong place for the command also on the logical interface

Hope to help

Giuseppe

limtohsoon Thu, 08/20/2009 - 02:27

Hi Giuseppe,

Thanks for your reply.

The port-channel interface is facing client.

Thank you.

B.Rgds,

Lim TS

Peter Paluch Thu, 08/20/2009 - 03:01

Hello Lim,

Please allow me a question: Why do you want to use the "ip tcp adjust-mss" command? Do you have a special reason to manipulate the MSS?

Best regards,

Peter

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