BGP offloading (fixing legacy router BGP scalability issues)

Paul S. contact at
Thu Apr 2 07:40:49 UTC 2015

Do you have data on '100% of the traffic' being bad?

I happen to have a large Chinese clientbase, and this is not the case on 
my network.

On 4/2/2015 午後 04:35, Colin Johnston wrote:
> or ignore/block russia and north korea and china network blocks
> takes away 5% of network ranges for memory headroom, especially the large number of smaller china blocks.
> Some may say this is harsh but is the network contacts refuse to co-operate with abuse and 100% of the traffic is bad then why not
> Colin
>> On 2 Apr 2015, at 07:59, Mark Tinka <mark.tinka at> wrote:
>> On 1/Apr/15 19:01, Frederik Kriewitz wrote:
>>> We're wondering if anyone has experience with such a setup?
>> Cisco have a feature called BGP-SD (BGP Selective Download).
>> With BGP-SD, you can hold millions of entries in RAM, but decide what
>> gets downloaded into the FIB. By doing this, you can still export a full
>> BGP table to customers directly connected to your 6500, and only have a
>> 0/0 + ::/0 (and some more customer routes) in the FIB to do forwarding
>> to a bigger box.
>> BGP-SD started shipping in IOS XE, but I now understand that the feature
>> is on anything running IOS 15.
>> This would be my recommendation.
>> Mark.

More information about the NANOG mailing list