I have a "why" question on Volume 2 lab 6 question 8.2. Essentially the
question asks me to use a sham link across an inter-as VPN. No problem I
installed the sham link and it work fine:
R8#sh ip os sham
Sham Link OSPF_SL0 to address 9.3.0.1 is up
Area 0 source address 9.3.0.8
And the routes are advertised across the MPLS vpn not across the back to back
link.
My question is why aren't the sham link end points showing up in the CE ospf
routing table? Should they? They always do in an intra-area sham link
scenario. I am using the same ospf process id on both PE, so domain-id should
not be a factor.
As a test I set the domain-id to 1.1.1.1 on R1 and 2.2.2.2 on R8. Cleared the
process no difference. No E2 routes. I can down the sham links and send
traffic across the R3 - R9 link or up the sham link and have the routes again
flow across the mpls link, all as expected, but I never get E2 routes (or any
sham link end points) like I do on a intra-area sham link.
I have tried this with both redistributed connected and with a network
statement under the ipv4 vrf address family (on at a time) but it does not make
a difference. Should it make a difference?
Is this expected behavior? Did anyone else get the sham link end points to
show up int the CE routing table?
Thanks
Thomas Loran
R9#sh ip route os
9.0.0.0/32 is subnetted, 2 subnets
O 9.3.0.3 [110/67] via 98.9.8.8, 00:04:31, FastEthernet0/0.908
31.0.0.0/24 is subnetted, 1 subnets
O 31.3.1.0 [110/66] via 98.9.8.8, 00:04:31, FastEthernet0/0.908
R9#
R8#sh ip bgp vpnv4 vrf VPN_B
BGP table version is 30, local router ID is 6.7.8.8
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 678:2 (default for vrf VPN_B)
*>i9.3.0.1/32 125.125.125.1 0 100 0 125 ?
*>i9.3.0.3/32 125.125.125.1 0 100 0 125 ?
*> 9.3.0.8/32 0.0.0.0 0 32768 ?
*> 9.3.0.9/32 98.9.8.9 2 32768 ?
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