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On 8/23/2012 5:09 PM, Owen DeLong wrote: > On Aug 23, 2012, at 11:33 , James Stahr<[log in to unmask]> wrote: > > >> We can remotely verify that everyone has configured a secondary IP, but that's just the start. You've also got to duplicate ALL of your peer BGP sessions beforehand as well. Why? Well, >> I don't believe Cisco can initiate a BGP session on a secondary address so once a $C router switches their primary and secondary, they cannot initiate a BGP session. Not a problem yet. What about when the next one does it? Suddenly neither of the Cisco devices can peer with each other.. I've not been through an exchange re-address, but given this limitation, I foresee many problems and the idea of a "flag day" much more appealing - luckily though, most participants are using the route server. >> > It can, actually... You just need to add update-sourceto the configuration. > > A straight IP isn't an option here on either SRE or an ASR running IOS-XE 3.4.2, only a list of 50+ different types of interfaces. Are you using IOS-XR? -James ######################################################################## To unsubscribe from the MICE-DISCUSS list, click the following link: http://lists.iphouse.net/cgi-bin/wa?SUBED1=MICE-DISCUSS&A=1