Hi nanog I need to advertise EIGRP route with a different next-hop value than self Due to how the connections are setup, I have to run BGP between two peers that are 3 hops away from each other. router1--router2--firewall--router3 I'm running EBGP between router1 and router3 router1 is redistributing into EIGRP that's running with router2 The problem is that now router2 thinks that router3 routes are reachable via router1 so I have myself a route loop. Is there a way to advertise an EIGRP route with next hop of router3 (or firewall for that matter) rather than router1 which is what EIGRP does by default Thank you in advance for advice. -- Andrey Khomyakov [khomyakov.andrey@gmail.com]
What's the real goal behind this? What your describing sounds like a horrible band-aid.... David. On Mon, Apr 18, 2011 at 5:08 PM, Andrey Khomyakov < khomyakov.andrey@gmail.com> wrote:
Hi nanog
I need to advertise EIGRP route with a different next-hop value than self
Due to how the connections are setup, I have to run BGP between two peers that are 3 hops away from each other.
router1--router2--firewall--router3 I'm running EBGP between router1 and router3 router1 is redistributing into EIGRP that's running with router2
The problem is that now router2 thinks that router3 routes are reachable via router1 so I have myself a route loop.
Is there a way to advertise an EIGRP route with next hop of router3 (or firewall for that matter) rather than router1 which is what EIGRP does by default
Thank you in advance for advice.
-- Andrey Khomyakov [khomyakov.andrey@gmail.com]
How many bgp prefixes do you have? Can you just put statics on router 2? On Apr 18, 2011, at 8:26 PM, "David Swafford" <david@davidswafford.com> wrote:
What's the real goal behind this? What your describing sounds like a horrible band-aid....
David.
On Mon, Apr 18, 2011 at 5:08 PM, Andrey Khomyakov < khomyakov.andrey@gmail.com> wrote:
Hi nanog
I need to advertise EIGRP route with a different next-hop value than self
Due to how the connections are setup, I have to run BGP between two peers that are 3 hops away from each other.
router1--router2--firewall--router3 I'm running EBGP between router1 and router3 router1 is redistributing into EIGRP that's running with router2
The problem is that now router2 thinks that router3 routes are reachable via router1 so I have myself a route loop.
Is there a way to advertise an EIGRP route with next hop of router3 (or firewall for that matter) rather than router1 which is what EIGRP does by default
Thank you in advance for advice.
-- Andrey Khomyakov [khomyakov.andrey@gmail.com]
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The goal is to withdraw the prefixes should any part of the connection go down. Unfortunately router1--router2--firewall is part of a production setup and not easily changed. The idea is really to have something like this (ideally without router2): router1-router2-firewall-router3 | | router4-firewall-router5 I just wanted to check if I'm missing some knowledge about redistributing BGP into EIGRP. It appears that there is really no way to manipulate next-hop value. (no ip next-hop-self eigrp 1 is not really an option because there are many more prefixes coming from other routers that are being redistributed to router2 from router1) I will see if the network will allow BGP on router2. That seems to be the only clean solution for this. On Mon, Apr 18, 2011 at 9:25 PM, David Swafford <david@davidswafford.com>wrote:
What's the real goal behind this? What your describing sounds like a horrible band-aid....
David.
On Mon, Apr 18, 2011 at 5:08 PM, Andrey Khomyakov < khomyakov.andrey@gmail.com> wrote:
Hi nanog
I need to advertise EIGRP route with a different next-hop value than self
Due to how the connections are setup, I have to run BGP between two peers that are 3 hops away from each other.
router1--router2--firewall--router3 I'm running EBGP between router1 and router3 router1 is redistributing into EIGRP that's running with router2
The problem is that now router2 thinks that router3 routes are reachable via router1 so I have myself a route loop.
Is there a way to advertise an EIGRP route with next hop of router3 (or firewall for that matter) rather than router1 which is what EIGRP does by default
Thank you in advance for advice.
-- Andrey Khomyakov [khomyakov.andrey@gmail.com]
-- Andrey Khomyakov [khomyakov.andrey@gmail.com]
If the number of prefixes are small, and your on Cisco gear, take a look at IP SLA as an option for manipulating static routes. Basically it'll allow you to setup a probe, and based on the result of the probe, dynamically populate a given static route in the routing table or not. David. On Mon, Apr 18, 2011 at 10:57 PM, Andrey Khomyakov < khomyakov.andrey@gmail.com> wrote:
The goal is to withdraw the prefixes should any part of the connection go down. Unfortunately router1--router2--firewall is part of a production setup and not easily changed. The idea is really to have something like this (ideally without router2):
router1-router2-firewall-router3 | | router4-firewall-router5
I just wanted to check if I'm missing some knowledge about redistributing BGP into EIGRP. It appears that there is really no way to manipulate next-hop value. (no ip next-hop-self eigrp 1 is not really an option because there are many more prefixes coming from other routers that are being redistributed to router2 from router1)
I will see if the network will allow BGP on router2. That seems to be the only clean solution for this.
On Mon, Apr 18, 2011 at 9:25 PM, David Swafford <david@davidswafford.com
wrote:
What's the real goal behind this? What your describing sounds like a horrible band-aid....
David.
On Mon, Apr 18, 2011 at 5:08 PM, Andrey Khomyakov < khomyakov.andrey@gmail.com> wrote:
Hi nanog
I need to advertise EIGRP route with a different next-hop value than self
Due to how the connections are setup, I have to run BGP between two peers that are 3 hops away from each other.
router1--router2--firewall--router3 I'm running EBGP between router1 and router3 router1 is redistributing into EIGRP that's running with router2
The problem is that now router2 thinks that router3 routes are reachable via router1 so I have myself a route loop.
Is there a way to advertise an EIGRP route with next hop of router3 (or firewall for that matter) rather than router1 which is what EIGRP does by default
Thank you in advance for advice.
-- Andrey Khomyakov [khomyakov.andrey@gmail.com]
-- Andrey Khomyakov [khomyakov.andrey@gmail.com]
participants (3)
-
Andrey Khomyakov -
David Swafford -
Matt Newsom