10-07-2008 12:10 PM - edited 03-03-2019 11:49 PM
Is there a way to verify that my BGP(internet) internet connected router is getting all the internet routes it should be getting?
10-07-2008 12:12 PM
You should be able to run:
sh ip bgp neig
sh ip route bgp
Others know more about BGP than I do, but these are the basic commands to see if you have a neighbor configured, and then to see if you're BGP routes are showing up in your routing table. They'll be marked with a "B."
--John
10-07-2008 12:44 PM
thank you but I was probably to vague in my qiestion. I understand how to see BGP neighbors and view BGP routes in the routing table I was more concerned with being able to verify that I was getting all the routes from my ISP. Now that I look at it more closely I am not sure there is any way other than seeing the total route counts and if it is in 100K+ range assume I am getting all internet routes.
thanks
10-07-2008 11:22 PM
In fact, it's more in the 250K+ range than in the 100K. If you only have ~100K routes, you are missing more than half the internet.
I think your provider is feeding your router with "customer routes", i.e., its own routes plus their clients'.
10-08-2008 12:56 AM
Hello,
You can use the "sh ip bgp sum" command to view quickly an approximate total number of routes received from your ISP.
Sample output:
...
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
...
The value under the "State/PfxRcd" column shows how many prefixes you have received over an established session with your peer (~265990 now).
Check out the website: http://bgp.potaroo.net/ for current status of the Internet Routing Table.
Kind Regards,
M.
10-08-2008 01:06 PM
Hello Mari,
good answer and good link too
Best Regards
Giuseppe
10-08-2008 01:17 PM
great link, thanks for the information.
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