RE: OSPF Sham-Link

Are you able to ping from loopback to loopback?

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Santiago Enciso
Sent: Sunday, October 04, 2009 9:23 PM
To: ccielab_at_groupstudy.com
Subject: OSPF Sham-Link

Hello Group, I'm configuring ospf sham link in a small mpls network but the
sham link doesnt come up.
the config guide says that the ip address used for the SL must belong to the
VRF,
not be advertised in ospf and be advertised via BGP.
I created a dummy loopback in the corresponding VRF and then ip address,
have configured the SL command
under the ospf process for that vrf but am not sure how to have the dummy
loopback /32 address be advertised
via BGP, I mean redistribution or the network command?

http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_ospf_com_backbone_ps6441_TSD_Products_Configuration_Guide_Chapter.html#wp1024430

*
*
*
*
*interface Loopback100
 description SHAM-LINK
 ip vrf forwarding sham-link
 ip address 10.0.100.1 255.255.255.255

interface Loopback100
 description SHAM-LINK
 ip vrf forwarding sham-link
 ip address 10.0.100.2 255.255.255.255
*
*
*
*show ip ospf sham-link*
*Sham Link OSPF_SL0 to address 10.0.100.2 is down*
*Area 0 source address 10.0.100.1*
* Run as demand circuit*
* DoNotAge LSA allowed. Cost of using 1 State DOWN,*
* Timer intervals configured, Hello 10, Dead 40, Wait 40,*
*
router ospf 2 vrf sham-link
 log-adjacency-changes
 area 0 sham-link 10.0.100.1 10.0.100.2
 network 192.168.11.1 0.0.0.0 area 0

router ospf 2 vrf sham-link
 log-adjacency-changes
 area 0 sham-link 10.0.100.2 10.0.100.1
 redistribute bgp 65000 subnets
 network 192.168.22.1 0.0.0.0 area 0

If I shut the backdoor link traffic gets routed across the mpls backbone
*

my mpls backbone is oprational

any idea?

Thanks

Santiago E

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Received on Sun Oct 04 2009 - 22:09:09 ART