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-source<IP_ADDR> to 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
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