Re: BGP LABEL LSP

Hi

Did you manage to send the output of the commands below.

Are you trying to Simulate CsC or this is a scenario at work.

regards

On Tue, Dec 11, 2012 at 11:08 PM, Brian McGahan <bmcgahan_at_ine.com> wrote:

> Post the following:
>
> show ip route
> show mpls forwarding
> show ip bgp labels
> show ip cef w.x.y.z
>
> Where w.x.y.z is the destination in question.
>
> Brian McGahan, CCIE #8593 (R&S/SP/Security)
> bmcgahan_at_INE.com
>
> Internetwork Expert, Inc.
> http://www.INE.com
>
> On Dec 11, 2012, at 11:20 AM, "Routing Freak" <routingfreak_at_gmail.com>
> wrote:
>
> Hi
>
> The following are the configs
>
> R5
>
> router bgp 100
>
> neighbor 1.1.1.1 remote-as 100
> neighbor 1.1.1.1 update-source loopback0
> network 55.55.55.55 mask 255.255.255.255
>
> R1
>
> router bgp 100
>
> neig 5.5.5.5 remote-as 100
> neighbor 5.5.5.5 route-reflector client
> nei 5.5.5.5 update source loopback0
> neighbor 12.12.12.2 remote-as 200
> neighbor 12.12.12.2 send label
> neighbor 12.12.12.2 send community both
> neighbor 3.3.3.3 remote-as 100
> neig 3.3.3.3 update-source loopback0
> neig 3.3.3.3 route-reflector client
> neig 3.3.3.3 send label
> neigh 3.3.3.3 send community both
>
> int fa 0/1
> description Connected to AS200
> ip add 12.12.12.1 255.255.255.0
> mpls bgp forwarding
> no sh
>
> R2
>
> router bgp 200
>
> neig 12.12.12.1 remote as 100
> neigh 12.12.12.1 send label
> nei 12.12.12.1 send community both
> nei 23.23.23.3 remote-as 100
> neig 23.23.23.3 send label
> neigh 23.23.23.3 send community both
>
>
> int fa 0/1
> description Connected to R1
> ip add 12.12.12.1 255.255.255.0
> mpls bgp forwarding
>
> int fa 0/2
> description Connexted to R3
> ip add 23.23.23.2 255.255.255.0
> mpls bgp forwarding
>
> R3
>
> router bgp 100
> nei 23.23.23.2 remote-as 200
> nei 23.23.23.2 send label
> nei 23.23.23.2 send community both
>
> nei 1.1.1.1 remote-as 100
> nei 1.1.1.1 update sour loopback0
> nei 1.1.1.1 send comm both
> nei 1.1.1.1 send label
>
>
> THere is also one more doubt
>
> What is the differecne between Send Label to a iBGP neighbor and eBGP
> neighbor
>
>
> On Tue, Dec 11, 2012 at 8:32 PM, Darlington Ngaiso <ngaissod_at_gmail.com>wrote:
>
>> Hi
>>
>> Can you please send the config on the routers in question.
>>
>> regards
>>
>> On Tue, Dec 11, 2012 at 5:26 PM, Routing Freak <routingfreak_at_gmail.com>wrote:
>>
>>> Hi Marko
>>>
>>> I can see that the route is not using BGP LSP. I am seeing that it is
>>> taking only the IP Path and not the LSP path.
>>>
>>> I want the traffic to go into LSP and not take the Ip routing path.
>>>
>>> I am not seeing that BGP LSP is formed from R3 to R1.
>>>
>>>
>>> On Tue, Dec 11, 2012 at 9:52 AM, Marko Milivojevic <markom_at_ipexpert.com
>>> >wrote:
>>>
>>> > What happened when you labbed it up?
>>> >
>>> > --
>>> > Marko Milivojevic - CCIE #18427 (SP R&S)
>>> > Senior CCIE Instructor - IPexpert
>>> >
>>> > :: This message was sent from a mobile device. I apologize for errors
>>> and
>>> > brevity. ::
>>> >
>>> > On Dec 10, 2012, at 18:00, Routing Freak <routingfreak_at_gmail.com>
>>> wrote:
>>> >
>>> > Anybody get this ? ANy thoughts on this ?
>>> >
>>> >
>>> >
>>> >
>>> > On Mon, Dec 10, 2012 at 10:41 PM, Routing Freak <
>>> routingfreak_at_gmail.com>wrote:
>>> >
>>> >> Hi
>>> >>
>>> >> I have a topology like this
>>> >>
>>> >> ____________ibgp______________
>>> >>
>>> >>
>>> R5------------------R1-------------------R2-----------------------R3
>>> >> ibgp ebgp ebgp
>>> >>
>>> >>
>>> >> R1 and R3 are running iBGP in AS 100 and R1 and R2 are running eBGP
>>> with
>>> >> R2 in AS 200 and respectively R2 and R3 are eBGP neighbors.
>>> >>
>>> >> There is no physical connection between R1 and R3 . There is an iBGP
>>> peer
>>> >> between R1 and R3 via R2 which is a eBGP peer with both R1 and R3
>>> >>
>>> >> Now R1 is a RR and R5 and R3 are clients
>>> >>
>>> >> MPLS is enabled between R1 and R2 and R2 and R3. But there is no LDP
>>> or
>>> >> RSVP enabled on those interfaces.I have just enabled the forwarding
>>> place
>>> >> saying that this interface can receive labelled packets.
>>> >>
>>> >> R3 is learning R5's routes via R1's iBGP connection with a next hop
>>> as R5.
>>> >>
>>> >> R5's loopback is advertised as ebGP route to R2 from R1 and it is
>>> passed
>>> >> to R3 from R2 as eBGP route.
>>> >>
>>> >> Now when R1 is sending as Ipv4 Unicast routes with Labels on it. (
>>> with
>>> >> Send label option ) to R2.
>>> >>
>>> >> R2 is also having the send label in the eBGP peering with R3 .
>>> >>
>>> >> So now for R3 to reach R5s loopback there it should use a label sent
>>> from
>>> >> eBGP neighbor R2.
>>> >>
>>> >> So now here is the problem part. I dont have a label for the prefixes
>>> (
>>> >> ie R5 advertised prefixes ) and i only have the next hop which is R5
>>> >> loopback label ( ie advertised by R2 to R3 ) .
>>> >>
>>> >> So when R3 is sending traffic to R5's prefixes, will it use the BGP
>>> label
>>> >> to R2 and R2 will use the BGP label to reach R1 and then R1 will
>>> strip the
>>> >> label and do a normal routing lookup to send traffic to R5
>>> >>
>>> >> Will BGP label forms an LSP ?. When a next hop in a BGP table is again
>>> >> learned by BGP, will it use the BGP label to send the traffic ?
>>> >>
>>> >> Without the prefix label , will only the next hop BGP label will work
>>> to
>>> >> form LSP ?
>>> >>
>>> >>
>>> >>
>>> >>
>>> >>
>>> >
>>>
>>>
>>> --
>>> Regards
>>> Routing Freak CCIE#35889 (SPv3)
>>>
>>>
>>> Blogs and organic groups at http://www.ccie.net
>>>
>>> _______________________________________________________________________
>>> Subscription information may be found at:
>>> http://www.groupstudy.com/list/CCIELab.html
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>
>
> --
> Regards
> Routing Freak CCIE#35889 (SPv3)

Blogs and organic groups at http://www.ccie.net
Received on Thu Dec 13 2012 - 11:14:47 ART