[c-nsp] SUP 720 3BXL + 2 BGP Full View + MPLS VPN

Pavel Kuzin pk at nodex.ru
Fri Feb 29 11:05:36 EST 2008 

bbn-ms-gw#debug bgp ipv4 unicast mpls 
BGP MPLS labels debugging is on

2w0d: BGP: adding MPLS label to 202.52.15.0/24 sending labels not enabled
2w0d: BGP: adding MPLS label to 202.52.12.0/24 sending labels not enabled


Why it added MPLS label to prefix? 

Noone told it to do that.

--
Pavel D.Kuzin
Technical Director.
Nodex LTD.
Saint-Petersburg, Russia
pk at nodex.ru
http://nodex.ru
tel. +7 812 3800033 ext. 311
fax. +7 812 2304573

----- Original Message ----- 
From: "Pavel Kuzin" <pk at nodex.ru>
To: <cisco-nsp at puck.nether.net>
Sent: Friday, February 29, 2008 10:59 AM
Subject: Re: [c-nsp] SUP 720 3BXL + 2 BGP Full View + MPLS VPN


> Hi!
> 
> No. I do not redistribute bgp into igp.
> I was send my BGP config in previons letter.
> I do not have any vfr`s configured.. :-(
> 
> --
> Pavel D.Kuzin
> Technical Director.
> Nodex LTD.
> Saint-Petersburg, Russia
> pk at nodex.ru
> http://nodex.ru
> tel. +7 812 3800033 ext. 311
> fax. +7 812 2304573
> 
> ----- Original Message ----- 
> From: "Ian Cox" <icox at cisco.com>
> To: "Pavel Kuzin" <pk at nodex.ru>
> Sent: Friday, February 29, 2008 2:37 AM
> Subject: Re: [c-nsp] SUP 720 3BXL + 2 BGP Full View + MPLS VPN
> 
> 
>> 
>> Your not redistributing bgp into your igp? Normally the only way the 
>> prefix table in bgp causes a label per prefix is if you place it into 
>> a vrf, or you redistribute bgp into your igp. The normal case is you 
>> only have labels created for routes in your igp. Since you don't have 
>> routes in the vrf, is your bgp tabe somehow ending up in your igp?
>> 
>> 
>> Ian
>> 
>> 
>> At 12:58 AM 2/29/2008 +0300, you wrote:
>>>Hi
>>>
>>>BGP currently only in global. No one VRF configured in system.
>>>
>>>This is my BGP config:
>>>
>>>router bgp XXXXX
>>>   bgp router-id XX.XX.XX.15
>>>   bgp always-compare-med
>>>   no bgp default ipv4-unicast
>>>   bgp cluster-id XX.XX.XX.0
>>>   bgp log-neighbor-changes
>>>   neighbor XX.XX.XX.10 remote-as XXXXX
>>>   neighbor XX.XX.XX.10 description XXXXX-GW
>>>   neighbor XX.XX.XX.10 update-source Loopback0
>>>   neighbor XX.XX.XX.14 remote-as XXXXX
>>>   neighbor XX.XX.XX.14 description XXX-GW
>>>   neighbor XX.XX.XX.14 update-source Loopback0
>>>   neighbor XX.XX.225.153 remote-as 3216
>>>   neighbor XX.XX.225.153 description GOLDEN-TELECOM
>>>   neighbor XX.XX.67.33 remote-as 1299
>>>   neighbor XX.XX.67.33 description TELIA-SONERA
>>>   !
>>>   address-family ipv4
>>>     neighbor XX.XX.XX.10 activate
>>>     neighbor XX.XX.XX.10 send-community extended
>>>     neighbor XX.XX.XX.10 route-reflector-client
>>>     neighbor XX.XX.XX.14 activate
>>>     neighbor XX.XX.XX.14 send-community both
>>>     neighbor XX.XX.XX.14 route-reflector-client
>>>     neighbor XX.XX.225.153 activate
>>>     neighbor XX.XX.225.153 next-hop-self
>>>     neighbor XX.XX.225.153 route-map from_golden in
>>>     neighbor XX.XX.225.153 route-map GOLDEN-OUT out
>>>     neighbor XX.XX.67.33 activate
>>>     neighbor XX.XX.67.33 next-hop-self
>>>     neighbor XX.XX.67.33 route-map from_telia in
>>>     neighbor XX.XX.67.33 route-map TELIA-OUT out
>>>     no auto-summary
>>>     no synchronization
>>>
>>>   exit-address-family
>>>   !
>>>   address-family vpnv4
>>>     neighbor XX.XX.XX.10 activate
>>>     neighbor XX.XX.XX.10 send-community extended
>>>     neighbor XX.XX.XX.10 route-reflector-client
>>>     neighbor XX.XX.XX.14 activate
>>>     neighbor XX.XX.XX.14 send-community extended
>>>     neighbor XX.XX.XX.14 route-reflector-client
>>>   exit-address-family
>>>
>>> >
>>>
>>> > Are you placing the BGP routes into a VRF rather than the global
>>> > table? In the global case you will end up with labels just for IGP routes,
>>> > with the VRF case you will end up with a label per prefix.
>>> >
>>> >
>>> > Ian
>>> >
>>> >
>>> > At 11:35 PM 2/28/2008 +0300, Pavel Kuzin wrote:
>>> >
>>> >> Hi!
>>> >>
>>> >>
>>> >> Thanks for your reply.
>>> >>
>>> >>
>>> >> I have just simple MPLS and BGP config too.
>>> >>
>>> >>
>>> >> #sh run | in mpls
>>> >> mpls ldp loop-detection mpls label protocol ldp mpls mtu 1540 mpls ip mpls
>>> >> mtu 1540 mpls ip mpls mtu 1540 mpls ip mpls ldp router-id Loopback0 force
>>> >>
>>> >> #sh mpls interfaces
>>> >> Interface              IP            Tunnel   BGP Static Operational
>>> >> Vlan100                Yes (ldp)     No       No  No     Yes
>>> >> Vlan410                Yes (ldp)     No       No  No     Yes
>>> >> Vlan301                Yes (ldp)     No       No  No     Yes
>>> >>
>>> >>
>>> >>
>>> >>> hi pavel,
>>> >>>
>>> >>> i must admit, i'm not an mpls guru, but im working on it ;) whilst i
>>> >>> can't offer you any direct solution, i can say i'm a bit fascinated
>>> >>> by this because i have for example a sup720 3bxl taking 3 x full views
>>> >>> 243k
>>> >>> routes per peer, have mpls tag switching enabled on 5 SVI's and i dont
>>> >>> see the behaviour you see.
>>> >>>
>>> >>> router#sh mpls int | i Vl Vlan2                  Yes (ldp)     No Yes
>>> >>> Vlan3                  Yes (ldp)     No       Yes
>>> >>> Vlan4                  Yes (ldp)     No       Yes
>>> >>> Vlan12                 Yes (ldp)     No       Yes
>>> >>> Vlan14                 Yes (ldp)     No       Yes
>>> >>>
>>> >>>
>>> >>>
>>> >>> router# sh ip bgp sum Neighbor        V    AS MsgRcvd MsgSent
>>> >>> TblVer
>>> >>> InQ OutQ Up/Down
>>> >>> State/PfxRcd
>>> >>> 61.88.xxx.xx    4  7474 19165667  424902 69092680    0    0 21w2d
>>> >>> 243009
>>> >>> 61.88.xxx.xx    4  7474 20943846  426386 69092680    0    0 5w2d
>>> >>> 243007
>>> >>> 220.157.xx.x    4  9723 12753587 15032863 69092733    0    0 2w0d
>>> >>> 243093
>>> >>>
>>> >>>
>>> >>>
>>> >>> router#sh platform hardware cap | b L3 Forward L3 Forwarding
>>> >>> Resources
>>> >>> FIB TCAM usage:                     Total        Used
>>> >>> %Used
>>> >>> 72 bits (IPv4, MPLS, EoM)     524288      246423
>>> >>> 47%
>>> >>> 144 bits (IP mcast, IPv6)      262144           5
>>> >>> 1%
>>> >>>
>>> >>>
>>> >>>
>>> >>> router#sh mpls ip bind sum Total number of prefixes: 1453
>>> >>>
>>> >>>
>>> >>> Generic label bindings
>>> >>> assigned        learned prefixes      in labels     out labels 1453
>>> >>> 1446          13042
>>> >>>
>>> >>>
>>> >>>
>>> >>> my mpls config is pretty straight forward
>>> >>>
>>> >>> mpls label range 16 256000 mpls label protocol ldp no tag-switching
>>> >>> ip propagate-ttl tag-switching tdp router-id Loopback0 force
>>> >>>
>>> >>> ... very curious !!
>>> >>>
>>> >>>
>>> >>>
>>> >>> hardware is sup720 pfc3bxl with ios 12.2(18)SXF8
>>> >>>
>>> >>> kind regards,
>>> >>>
>>> >>> --matt
>>> >>>
>>> >>>
>>> >>>
>>> >>>
>>> >>>
>>> >>>
>>> >>
>>> >> _______________________________________________
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>>> >
>>> >
>>>
>>>_______________________________________________
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>> 
>>
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