I'm using the following ACL on my distribution router which connects to core and as soon as as i apply inboud or outboud the ospf dies, i see the log dead time expired. Do I need to allow anything in the ACL for OSPF to work? Please advice
ip access-list extended my-filter-inbound
permit ip 10.8.0.0 0.0.255.255 10.13.0.0 0.0.255.255
permit ip 10.1.31.0 0.0.0.255 10.13.0.0 0.0.255.255
permit ip 10.1.32.0 0.0.0.255 10.13.0.0 0.0.255.255
permit ip 10.5.30.0 0.0.0.255 10.13.0.0 0.0.255.255
permit ip 10.7.149.0 0.0.0.255 10.13.0.0 0.0.255.255
I imagine that you are using a point-to-point OSPF network type, since you are talking about the links between your core and distribution layer switches in the data Center. Recall that with OSPF point-to-point networks, LSAs are multicast to on 220.127.116.11, the AllSPFRouters address.
try allowing such traffic as part of the access list and get back to us with the results.
I was giving the questioner a conceptual solution and approach, not the actual config lines. The point I was making was that OSPF traffic should be permitted and why it is that his access list fails ot permit it.
Thanks everyone for their valuable input. I tired both solution, ie permit ospf any any and permit ospf multicast packet and both have worked flawlessly. At this time I'm going to use permit ospf any any (for simplicity).
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