Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Full BGP routing table

In what scenarios one should configure BGP to download full BGP routing table from an ISP?

TIA

Shahbaz Zubairi

3 REPLIES
New Member

Re: Full BGP routing table

maybe have multi exit and need to do route policy

New Member

Re: Full BGP routing table

the main LAN i support is multi homed and all we have is a set of BGP default routes with different AS Path metrics. The full table consumes something like 25M of DRAM alone and cisco reccommend a minimum of 64M i think. Why bother when you can use static routes or BGP default routes ? I think the only scenario to need the complete table is if you maintain a transit AS.

Silver

Re: Full BGP routing table

If you are dual homed to two (or more) ISP's and wish to achieve optimal outbound routing it is beneficial to take full Internet routes from the ISP’s, you can then select your outbound path based on the shortest AS Path. If you only take partial or default routes you are more likely to take a sub-optimal path.

129
Views
0
Helpful
3
Replies
CreatePlease login to create content