RE: MPLS TE router-id

Hi Rich,

What is you topo? Are you using lo0 for MP-BGP peering?
Thanks
Rin.

-----Original Message-----
From: Rich Collins [mailto:nilsi2002_at_gmail.com]
Sent: Sunday, June 21, 2009 12:45 AM
To: Rin
Cc: Cisco certification
Subject: Re: MPLS TE router-id

Hi Rin,

I just tried the bgp vpnv4 routes and noticed that I could not ping
through the tunnel when it used loop1.

If you try this you see that only one tag is imposed and not two as
expected. Perhaps there are other clues why this is not working.

PE1#sh ip cef vrf A 45.45.45.0 detail
45.45.45.0/24, version 11, epoch 0
0 packets, 0 bytes
  tag information set
    local tag: VPN-route-head
    fast tag rewrite with
        Recursive rewrite via 2.2.2.2 0x20, tags imposed {21}
  via 2.2.2.2, 0 dependencies, recursive
    next hop 20.2.2.2, Tunnel0 via 2.2.2.2/32
    valid adjacency
    tag rewrite with
        Recursive rewrite via 2.2.2.2 0x20, tags imposed {21}

-Rich

On Sat, Jun 20, 2009 at 10:39 AM, Rich Collins<nilsi2002_at_gmail.com> wrote:
> Hi,
>
> I searched the Cisco site and found this:
>
>
http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_te_expl_addr
ess.html
> ..........................
>
> tunnel destination ip-address
> Example:
>
> Router(config-if)# tunnel destination 10.11.11.11
>
>
> Specifies the destination for a tunnel.
>
> The destination of the tunnel must be the MPLS traffic engineering
> router ID of the destination device.
>
>
> -----------------------------
>
> So in your example you could change the mpls traffic-eng router-id to
> lo1 on R3 and it would work. The R1 tunnel source ip address could be
> either lo0 or lo1.
>
> -Rich
>
> On Fri, Jun 19, 2009 at 5:52 AM, Rin<rintrum_at_gmail.com> wrote:
>> Hi group,
>>
>>
>>
>> I have this scenario: R1----R2----R3
>>
>> All routers are in the same area and configured with ISIS. Loopback 0 &
>> loopback 1 are created on R1 & R3. All interface are advertised into ISIS
>> (include lo0 & lo1). I create a MPLS TE tunnel (R1-->R2-->R3) on R1. The
>> MPLS TE router-id is the loopback 0 on each router.
>>
>> Case 1: If the tunnel source & destination set to lo0, the tunnel is UP.
>>
>> Case 2: If the tunnel source & destination set to lo1, the tunnel is
DOWN.
>>
>> My explicit-path pointing to lo0 in case 1 & lo1 in case 2
>>
>> So what is the relationship between router-id and the source IP,
>> destionation of the MPLS TE tunnel?
>>
>> Thanks.
>>
>> Rin.
>>
>>
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Received on Mon Jun 22 2009 - 21:18:15 ART