From: Joe Soricelli (jsoricelli@xxxxxxxx)
Date: Wed Jul 28 1999 - 06:35:57 GMT-3
Does r2 know how to get to the next hop (R3 interface) for that route via an
IGP?
If not, it will still not sync and install it in the routing table.
Either pull that segment into your IGP or have r1 do next-hop-self towards
r2.
-joe
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Joseph M. Soricelli, CCIE #4803, CCNP
EMAIL: jsoricelli@ccci.com
Chesapeake Computer Consultants, Inc.
8110 Gatehouse Road, Suite 101E Phone: (703) 207-0757
Falls Church, VA 22042 Fax: (703) 207-0441
FYI - About Chesapeake: We are a Cisco Certified Training and
professional services partner. We offer most of the Cisco
training courses as well as training for Fore, NetScout, and
CheckPoint-1 Firewalls. We provide network consulting services,
including design, network health, management, firewall,
and problem solving. We now have 21 CCIEs on our staff
of instructor/consultants.
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-----Original Message-----
From: Chuah Eng Wee <chuahew@cyberway.com.sg>
To: ccielab@groupstudy.com <ccielab@groupstudy.com>
Date: Wednesday, July 28, 1999 2:56 AM
Subject: Question on Synchronization
>Hi..
>
>Some questions on synchronisation. Below is the setup
>
> [r6]
> / \
>[r1]/ \[r2]
> |
> |
>[r3]
>
>
>r1,r6,r2 in AS 100; r1 and r2 running IBGP
>r3 in AS 200
>
>r3 announced the network 10.10.10.0 to r1 via EBGP.
>r2 then rx 10.10.10.0 in its BGP table via IBGP from r1.
>r2 did not put the route 10.10.10.0 into its IP routing
>table becos it does not know how to reach 10.10.10.0.
>This is a synchronisation issue.
>
>So I put a static route
>ip route 10.10.10.0 255.255.255.0 next-hop-to-r6
>
>with this statement, there is a static entry in the routing
>table. But debug ip bgp update shows that it is not synchronised.
>
>BGP: nettable_walker 10.10.10.0/255.255.255.0 calling revise_route
>BGP: revise route installing 10.10.10.0/255.255.255.0 -> 128.213.63.2
>BGP: nettable_walker 10.10.10.0/255.255.255.0 not synchronized
>
>
>WHY ?? I thot syncrhonisation rule states that if IGP knows the route
>it'll be considered synchronised and the router will advertise
>the route to external peers.
>
>Any advice ??
>
>Thanks
>Eng Wee
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