[OSPF] I have a question regarding forwarding address
Abhinay R <abhinay.is2006@gmail.com> Wed, 13 July 2016 12:11 UTC
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From: Abhinay R <abhinay.is2006@gmail.com>
Date: Wed, 13 Jul 2016 17:41:05 +0530
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Subject: [OSPF] I have a question regarding forwarding address
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Hi All, I have a question on when forwarding address is set in external LSA? Suppose I have a route from RIP say 100.1.1.0/24 with nexthop 10.1.1.1 in routing table and I want to redistribute that route into OSPF, then I feel below conditions must be vaild to set 10.1.1.1 as forwarding address in the external LSA that OSPF originates for 100.1.1.0/24 network. These conditions set the forwarding address field to a non-zero address: OSPF is enabled on the ASBR's next hop interface AND ASBR's next hop interface is non-passive under OSPF AND ASBR's next hop interface is not point-to-point AND ASBR's next hop interface is not point-to-multipoint AND ASBR's next hop interface address falls under the network range specified in the router ospf command. Any other conditions besides these set the forwarding address to 0.0.0.0. If I have 10.1.1.0/24 network as intra or inter route in OSPF routing table at the router that imported RIP route, do I originate External LSA with 10.1.1.1 set as forwarding address ? There is a confusion that if the redistributed network nexthop is present in routing table as intra inter or connected route, we need to set it as forwarding address. Please clarify. While we receive a External LSA with forwarding address set, then we see if there is a connected, intra or inter route to that nexthop and then use it to compute the route nexthop. This is clear. Thanks & Regards, Abhinay R
- Re: [OSPF] I have a question regarding forwarding… Acee Lindem (acee)
- Re: [OSPF] I have a question regarding forwarding… Abhinay R
- Re: [OSPF] I have a question regarding forwarding… Acee Lindem (acee)
- Re: [OSPF] I have a question regarding forwarding… Acee Lindem (acee)
- [OSPF] I have a question regarding forwarding add… Abhinay R