[c-nsp] Adjust mss on 6500

[Tassos Chatzithomaoglou]

Tim Stevenson wrote on 16/10/2006 10:25 μμ:
> Adjust mss requires that the CPU see TCP SYN packets so the 
> adjustment can be made during the handshake. As such, it requires h/w 
> programming of the ACL TCAM to do the redirection appropriately. The 
> software support to do this is not in any shipping s/w for the 6500 
> today, it is roadmapped for Q1CY07. (BTW, it is avail now in SRA 7600 code).
> 

So, it will be in 12.2(33)SXH?

Tassos

> Of course, any time a feature brings the CPU into the fwding path, I 
> urge you to understand the implications & use caution.
> 
> Tim
> 
> At 07:09 PM 10/16/2006 +0200, fredrik.jacobsson at seb.se commented:
>> Hi all!
>>
>> We have a couple of 6500's doing alot of encrypted GRE-tunnels.
>> IOS is 12.2(18)SXD7a
>>
>> I'm trying to set this command on a tunnel interface:
>> ip tcp adjust-mss 1400
>>
>> But:
>> XXXXXXXX(config-if)#ip tcp adjust-mss 1400
>>                            ^
>> % Invalid input detected at '^' marker.
>>
>> XXXXXXXX(config-if)#ip tcp ?
>>   compression-connections  Maximum number of compressed connections
>>   header-compression       Enable TCP header compression
>>
>>
>> Is there another way to do that?
>> (Can't understand why it doesn't have the ajust-mss feature)
>>
>> Best regards
>> /Fredrik Jacobsson
>>
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> 
> 
> 
> Tim Stevenson, tstevens at cisco.com
> Routing & Switching CCIE #5561
> Technical Marketing Engineer, Catalyst 6500
> Cisco Systems, http://www.cisco.com
> IP Phone: 408-526-6759
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