[c-nsp] BGP Required MTU Size Between Cisco Devices

[Keegan Holley]

5MB of BGP traffic seems strange although I never watched it receive a full
table so I may be mistaken.  Secondly, your problem is more MTU discovery
than specific MTU's if I had to guess.  There is alot of info missing
though.  What kind of traffic?  How many hops? Are the other hops larger or
smaller than 1600?  What is the error you get when BGP drops?  What kind of
device? interface? provider circuit or dark?

2011/9/22 Righa Shake <righa.shake at gmail.com>

> I had set my Interfaces on an MTU size of 1600 and BGP was unstable and
> could not pass traffic over 5MB.
> However when i tested an found that I could pass traffic without any issues
> when I eliminate the router.
>
> When I set the MTU to 1500 the BG was up and am now able to pass traffic
> without any problem.
>
> Regards,
> Righa Shake
>
>
> On Thu, Sep 22, 2011 at 9:03 PM, Keegan Holley <keegan.holley at sungard.com>wrote:
>
>> I think MTU discovery just has to work if you are going to use something
>> smaller than 1500 and fragmentation needs to work if you are going to set it
>> to something small.  There are other caveats for specific scenarios.
>>
>> 2011/9/22 Righa Shake <righa.shake at gmail.com>
>>
>>>  Hi,
>>>
>>> Is there any required MTU Size for Cisco BGP session to work
>>>
>>> Regards,
>>> Righa Shake
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>>>
>>
>