We have stood up a new network with new area 0. We are trying to figure out the best way to transition the legacy area 0 and non-backbone areas onto the new core. One solution is to maintain separate area 0s. We are still discussing this strategy but one question that remains unanswered is if an OSPF ABR receives a type 3 LSA on a non-backbone area interface will it import it into the routing table?
RTR1 would have a connection to RTR2 and RTR3 over area 1. RTR 2 and RTR 3 would also have a connection over area 1. Area 0s are disconnected.
Assuming the LSA is type 3, would routes learned from RTR 4 enter RTR 3 routing table. In most cases type 3 routes are usually learned through an area 0 interface. In this case it comes in on area 1, a non-backbone interface.
an ABR will ignore an LSA3 learned through a non- backbone area interface. This is one of the underlying reasons, that area0 MUST be contigous. Assume R1-area0-R2-area1-R3-area0-R4
In this case networks from R1 are learned by R3 through LSA3 from ABR R2. R3 has the LSA3 in its topology database from area1. But R4 will never get the networks as R3 will not insert the LSA3 information into area0.
From another point of view: if you have redundant ABRs, routing loops could arise, if LSA3 from a non-backbone-interface would be reinserted into the backbone area.
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
login w/ SSH 1 or 2 to the device compare to IOS device. After
investigation, the there is 1s delay between the client KEXDH_INIT and
the server (XR) KEXDH_REPLY. After debug ssh serv...
Introduction The purpose of this document is to demonstrate the Open
Shortest Path First (OSPF) behavior when the V-bit (Virtual-link bit) is
present in a non-backbone area. The V-bit is signaled in Type-1 LSA only
if the router is the endpoint of one or ...
Hi, I am seeing quite a few issues with patch install and wanted to
share my experience and workaround to this. Login to admin via CLI, then
access root with the “shell” command Issue “df –h” and you’ll probably
see the following directory full or nearly ...