[c-nsp] Segment Routing

[Mohammad Khalil]

Hi all and thanks for the kind reply
Will it work if I configured the command mpls ldp explicit-null ?

BR,
Mohammad

> Date: Sun, 13 Sep 2015 11:51:07 -0400
> Subject: Re: [c-nsp] Segment Routing
> From: mohan.nanduri at gmail.com
> To: eng_mssk at hotmail.com
> CC: cisco-nsp at puck.nether.net
> 
> PHP will happen as they are back to back in your topology. The range
> on XR is between 16000-23999. Anything above the range will not be
> installed (16000+15001 = 31001).
> 
> Cheers,
> -Mohan
> 
> 
> On Sun, Sep 13, 2015 at 4:44 AM, Mohammad Khalil <eng_mssk at hotmail.com> wrote:
> > 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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