Hi all
I came across segment routing and tried to simulate it using the below topology
CE1 -- XR1 -- XR2 -- CE2
ISIS is the running IGP between the XR boxes and below is the relevant
configuration
XR1
router isis 1
is-type level-2-only
net 49.0001.0000.0000.0010.00
address-family ipv4 unicast
metric-style wide
segment-routing mpls
!
interface Loopback0
address-family ipv4 unicast
prefix-sid index 1001
!
!
interface GigabitEthernet0/0/0/0
address-family ipv4 unicast
XR2
router isis 1
is-type level-2-only
net 49.0001.0000.0000.0020.00
address-family ipv4 unicast
metric-style wide
segment-routing mpls
!
interface Loopback0
address-family ipv4 unicast
prefix-sid index 1002
!
!
interface GigabitEthernet0/0/0/0
address-family ipv4 unicast
XR1
router bgp 1
address-family vpnv4 unicast
!
neighbor 20.20.20.20
remote-as 1
update-source Loopback0
address-family vpnv4 unicast
!
!
vrf MSSK
rd 1:1
address-family ipv4 unicast
redistribute connected
XR2
RP/0/0/CPU0:Clone#sh run router bgp
Sun Sep 13 11:37:16.085 UTC
router bgp 1
address-family vpnv4 unicast
!
neighbor 10.10.10.10
remote-as 1
update-source Loopback0
address-family vpnv4 unicast
!
!
vrf MSSK
rd 1:1
address-family ipv4 unicast
redistribute connected
The issue is that I cannot any labels imposed :
RP/0/0/CPU0:XRnew#sh cef 20.20.20.20/32 | inc labels
Sun Sep 13 11:37:37.416 UTC
local label 17002 labels imposed {ImplNull}
RP/0/0/CPU0:Clone#sh cef 10.10.10.10/32 | inc labels
Sun Sep 13 11:37:54.372 UTC
local label 17001 labels imposed {ImplNull}
Another weird issue am facing is that when I change the prefix-sid index on
both XR boxes to (15001 , 15002 respectively) , no labels are shown at all
RP/0/0/CPU0:XRnew#sh cef 20.20.20.20/32 | inc labels
Sun Sep 13 11:38:47.211 UTC
Any ideas guys?
Thanks
BR,
Mohammad
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