Network Nugget #5: Verifying IPV4 and VPNV4 BGP neighbours...
Thursday, 03 December 2009 16:37.
Whilst testing SP MPLS core networks one of the commands I inevitably use to ensure that all is good in the BGP 'hood is the BGP summary neighbours command. One slightly annoying thing is that you can never show a quick summary of both VPNV4 address-family neighbours and vanilla IPV4 neighbours in the same command...................UP UNTIL NOW DAGNAMMIT! and any potential savings on the wear and tear of my fingertips is all good by me. A command that I have found most useful indeed on newer IOS versions is:
Router#sho bgp all summary
This will show you the state of all BGP sessions on the router in one fell swoop. There are a few other extra bits and bobs underneath the "sho bgp" option which are quite useful too, but I won't spoil all of your "question mark" fun.
P.S. Neighbours is not a spelling mistake, I resolutely stand by my usage of the "u" until I'm forced to type into IOS CLI ;)
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