04-17-2018 12:45 AM - edited 03-01-2019 03:17 PM
Dear all,
i am running MPLs vpnv4 using mp bgp.
my CA1 and CA2 both are running ospf protocol on vrf CA and on PE router on both sides i redistribute the routes form ibgp to ospf and ospf to ibgp.
My question is that in CA routeing table the redistribution from iBGP routes should be E2 or E1 but the routes are O IA how come my vrf ospf knows that the redistribution from ibgp is basically O routes before IBGP.
thankx
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04-17-2018 01:10 AM - edited 04-17-2018 01:10 AM
Hey there,
Background:
Why you see routes as O IA:
PS:
For academic purpose, If I were you I would also take a look at how the sham-link works and how that would play a role in this scenario.
Hope this helps, L.
04-17-2018 03:22 AM
yup! the following show command shows domain-id set for the specific route (I have replaced real subnets and info wit letters):
show ip bgp vpnv4 vrf Test x.x.x.x/xx
BGP routing table entry for rd:x.x.x.x/xx, version x
Paths: (1 available, best #1, table Test)
Flag: 0x820
Not advertised to any peer
Local
y.y.y.y (metric N) from y.y.y.y(y.y.y.y)
Origin incomplete, metric 0, localpref 100, valid, internal, best
Extended Community: RT:rt OSPF DOMAIN ID:domain-id
OSPF RT:0.0.0.0:2:0 OSPF ROUTER ID:f.f.f.f
mpls labels in/out nolabel/19
04-17-2018 01:10 AM - edited 04-17-2018 01:10 AM
Hey there,
Background:
Why you see routes as O IA:
PS:
For academic purpose, If I were you I would also take a look at how the sham-link works and how that would play a role in this scenario.
Hope this helps, L.
04-17-2018 03:11 AM
04-17-2018 03:22 AM
yup! the following show command shows domain-id set for the specific route (I have replaced real subnets and info wit letters):
show ip bgp vpnv4 vrf Test x.x.x.x/xx
BGP routing table entry for rd:x.x.x.x/xx, version x
Paths: (1 available, best #1, table Test)
Flag: 0x820
Not advertised to any peer
Local
y.y.y.y (metric N) from y.y.y.y(y.y.y.y)
Origin incomplete, metric 0, localpref 100, valid, internal, best
Extended Community: RT:rt OSPF DOMAIN ID:domain-id
OSPF RT:0.0.0.0:2:0 OSPF ROUTER ID:f.f.f.f
mpls labels in/out nolabel/19
04-17-2018 03:39 AM
04-17-2018 03:55 AM
DOMAIN-ID is locally computed based on several OSPF parameters, to make it match with your peer, you must run OSPF with the same process ID and area on both sides. It cannot be manually set AFAIK.
Hope this helps. L.
04-17-2018 04:29 AM
04-17-2018 05:27 AM
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