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Changing mask from /30 to /29

Posted on 2013-11-12
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Last Modified: 2013-11-12
I have a router connected to a fw. I have /30 for the interfaces between the router and the fw. I was trying to change from /30 to /29 and the link went down and never came backup. It is EBGP between the router and the fw. Any thoughts? Thx

MPLS cloud <--> router <--> fw <--> internal network
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Question by:leblanc
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by:leblanc
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anybody? :)
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psychokraft earned 500 total points
ID: 39642344
Check what you are advertising in BGP. If you are advertising the network with mask 255.255.255.252 but the network is now actually 255.255.255.248, BGP will not advertise it. BGP will only actually advertise a network if an exacty match exists. Or, you could use an aggregate address command, but it would be easier to just change the network statement under router bgp. Can you post a config?
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