Re: mpls vpn question

Hi J R Garcia,

  If your platform supports,in order for troubleshooting you may use the
mpls traceroute feature similiar as below ,it may give some idea.

  router#traceroute mpls ipv4 10.250.16.250 255.255.255.255
Tracing MPLS Label Switched Path to 10.250.16.250/32, timeout is 2 seconds
Codes: '!' - success, 'Q' - request not transmitted,
       '.' - timeout, 'U' - unreachable,
       'R' - downstream router but not target,
       'M' - malformed request
Type escape sequence to abort.
  0 10.236.2.65 MRU 4474 [Labels: implicit-null Exp: 0]
! 1 10.236.2.66 14 ms

Thanks

Regards
Anantha Subramanian Natarajan

2009/10/13 Antonio Soares <amsoares_at_netcabo.pt>

> I would bet on CEF being disabled on the P router :)
>
>
> Regards,
>
> Antonio Soares, CCIE #18473 (R&S)
> amsoares_at_netcabo.pt
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Scott Morris
> Sent: terga-feira, 13 de Outubro de 2009 1:10
> To: JR Garcia
> Cc: Nicolas Leiva; ccielab_at_groupstudy.com
> Subject: Re: mpls vpn question
>
> Mmmmm... There's your issue. No label, no forwarding. :)
>
> Check your IGP. Routers use Lo0 by default as the RID. Do you have
> reachability and is it over the interface you're using to
> connect?
>
> You may need to look at transport discovery as well...
>
> But "show mpls ldp neighbor detail" may give you some more information
> about what's not working well!
>
> Cheers,
>
>
> *Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider) #4713,
>
> JNCIE-M #153, JNCIS-ER, CISSP, et al.
>
> JNCI-M, JNCI-ER
>
> evil_at_ine.com
>
>
> Internetwork Expert, Inc.
>
> http://www.InternetworkExpert.com <http://www.internetworkexpert.com/>
>
> Toll Free: 877-224-8987
>
> Outside US: 775-826-4344
>
>
> Knowledge is power.
>
> Power corrupts.
>
> Study hard and be Eeeeviiiil......
>
>
> JR Garcia wrote:
> > LDP is enabled. my P router has no entries in the LFIB, but i do see
> > both LDP neighbors up.
> >
> >
> > 2009/10/12 Nicolas Leiva <nicolasleiva_at_gmail.com>
> >
> >
> >> You have LDP enabled right?. Did you check the LFIB on every hop?.
> >>
> >> Nicolas
> >> http://ccie-en-espanol.blogspot.com/
> >>
> >> On Mon, Oct 12, 2009 at 7:35 PM, JR Garcia <ttuner_at_gmail.com> wrote:
> >>
> >>
> >>> topology looks like this: CE-PE-P-PE-CE
> >>>
> >>> the PE routers run MPBGP/iBGP between them, the P router is only
> >>> doing MPLS.
> >>>
> >>> On the CE/PE routers, i can see the routes from either side, but i
> >>> am unable to pass traffic.
> >>>
> >>> PE1:
> >>>
> >>> PE1#sh ip route vrf A
> >>>
> >>> Routing Table: A
> >>> Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
> >>> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> >>> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> >>> E1 - OSPF external type 1, E2 - OSPF external type 2
> >>> i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS
> >>> level-2
> >>> ia - IS-IS inter area, * - candidate default, U - per-user
> >>> static rout
> >>> o - ODR, P - periodic downloaded static route
> >>>
> >>> Gateway of last resort is not set
> >>>
> >>> 1.0.0.0/32 is subnetted, 1 subnets
> >>> B 1.1.1.1 is directly connected, 00:11:19, Loopback1
> >>> C 192.168.1.0/24 is directly connected, FastEthernet0/1
> >>> B 192.168.2.0/24 [200/0] via 10.2.2.1, 00:11:34
> >>> PE1#ping vrf A 192.168.2.1 source 192.168.1.1
> >>>
> >>> Type escape sequence to abort.
> >>> Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds:
> >>> Packet sent with a source address of 192.168.1.1 .....
> >>> Success rate is 0 percent (0/5)
> >>>
> >>>
> >>> PE2:
> >>> PE2#sh ip route vrf B
> >>>
> >>> Routing Table: B
> >>> Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
> >>> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> >>> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> >>> E1 - OSPF external type 1, E2 - OSPF external type 2
> >>> i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS
> >>> level-2
> >>> ia - IS-IS inter area, * - candidate default, U - per-user static
> >>> route
> >>> o - ODR, P - periodic downloaded static route
> >>>
> >>> Gateway of last resort is not set
> >>>
> >>> 1.0.0.0/32 is subnetted, 1 subnets
> >>> B 1.1.1.1 [200/0] via 10.1.1.1, 00:11:34
> >>> B 192.168.1.0/24 [200/0] via 10.1.1.1, 00:11:37
> >>> C 192.168.2.0/24 is directly connected, FastEthernet0/1
> >>>
> >>> PE2#ping vrf B 192.168.1.1 source 192.168.2.1
> >>>
> >>> Type escape sequence to abort.
> >>> Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
> >>> Packet sent with a source address of 192.168.2.1
> >>> .....
> >>> Success rate is 0 percent (0/5)
> >>>
> >>>
> >>> help?
> >>>
> >>>
> >>> Blogs and organic groups at http://www.ccie.net
> >>>
> >>> _______________________________________________________________________
> >>> Subscription information may be found at:
> >>> http://www.groupstudy.com/list/CCIELab.html
> >>>
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Tue Oct 13 2009 - 11:24:44 ART