[c-nsp] NPE-G1 support for jumbo frames

[Adam Armstrong]

Lasher, Donn wrote:
> -----Original Message-----
> From: Jose [mailto:lobo at allstream.net] 
> Sent: Tuesday, April 01, 2008 6:02 PM
> To: Lasher, Donn
> Cc: Cisco; Gerald Krause
> Subject: Re: [c-nsp] NPE-G1 support for jumbo frames
>
>   
>> Donn, what version of code were you using?  This is pretty scary 
>> considering that one of the factors of going to NPE-G1 is hoping to
>>     
> take 
>   
>> advantage of jumbo frame or at least 1530 on the three ports.
>>     
>
> This behavior occurred under every code revision we tested on the
> NPE-G2's, which was, 12.4.11T, and 12.2.3x-SB trains. It worked fine on
> the PA-FE-TX cards under the same train, just not on the onboard ports.
>
> Again, once the port is forced to 1000, either fiber or copper, any MTU
> up to 9216 wasn't a problem (assuming your switch can handle it). Forced
> at 100 however, it wouldn't exceed 1500+overhead, which breaks 1500
> unfragged inside an MPLS VPN.
>   
Are you sure this affects the NPE-G1 ?

I've never personally tested on an NPE-G2, but this NPE-G1 is fine:

thnlon-pe01#sh int gi 0/1 | i Gi|MTU|uplex
GigabitEthernet0/1 is up, line protocol is up
  MTU 1546 bytes, BW 100000 Kbit, DLY 100 usec,
  Full Duplex, 100Mbps, media type is RJ45

thnlon-pe01#sh ver | i NPE
Cisco 7206VXR (NPE-G1) processor (revision B) with 983040K/65536K bytes 
of memory.

thnlon-pe01#sh ver | i 12.2
Cisco IOS Software, 7200 Software (C7200-ADVIPSERVICESK9-M), Version 
12.2(33)SRC, RELEASE SOFTWARE (fc3)

Also worked on 12.3.22 Enterprise

adam.