Re: MPLS forwarding table

Good points.

Especially if you're studying for CCIE SP some versions of the code that you
use (usually 12.2/3) don't have CEF enabled by default - as we're used to.

Kambiz Agahian

CCIE Instructor/Consultant
M.Eng Telecom, CCIE# 25341, CCSI# 33326, MCSE, MCSA

On Tue, Aug 24, 2010 at 11:53 AM, Roman Rodichev <romangs_at_iementor.com>wrote:

> is cef on?
> is igp exchanging routes?
>
>
> Roman Rodichev
> 6xCCIE #7927 (R&S, Security, Voice, Storage, Service Provider, Wireless)
> Instructor, Content Developer, CEO
> ieMentor Corporation
> http://www.iementor.com
> Y!M: roman7927
>
> On Aug 24, 2010, at 1:36 PM, Edward John wrote:
>
> > Hi,
> >
> > Will there be any reason for not getting "mpls forwarding table" even
> when
> > ldp adjacency is UP and label binding is present?
> > I am using GNS3, and image is:c7200-p-mz.122-25.S14.bin
> >
> > *Following are config & captures:*
> >
> > *************Config********************
> > !
> > hostname Rack1R9
> > !
> > !
> > no mpls traffic-eng auto-bw timers frequency 0
> > mpls ldp neighbor 124.1.29.2 password CISCO
> > mpls ldp router-id Loopback0 force
> > !
> > !
> > interface Loopback0
> > ip address 124.1.9.9 255.255.255.255
> > no clns route-cache
> > !
> > interface Loopback1
> > ip address 12.0.0.9 255.255.0.0
> > no clns route-cache
> > !
> > interface Loopback2
> > ip address 12.1.0.9 255.255.0.0
> > no clns route-cache
> > !
> > interface ATM4/0
> > description Put ATM PVC Configs Here
> > no ip address
> > no atm enable-ilmi-trap
> > no clns route-cache
> > !
> > interface ATM4/0.29 point-to-point
> > ip address 124.1.29.9 255.255.255.0
> > no atm enable-ilmi-trap
> > mpls ldp discovery transport-address interface
> > mpls label protocol ldp
> > mpls ip
> > pvc 0/902
> > !
> > !
> > router bgp 9
> > no synchronization
> > bgp router-id 124.1.9.9
> > bgp log-neighbor-changes
> > network 12.0.0.0 mask 255.255.0.0
> > network 124.1.9.9 mask 255.255.255.255
> > neighbor 64.1.5.5 remote-as 100
> > neighbor 64.1.5.5 ebgp-multihop 15
> > neighbor 64.1.5.5 update-source Loopback0
> > neighbor 64.1.6.6 remote-as 100
> > neighbor 64.1.6.6 ebgp-multihop 15
> > neighbor 64.1.6.6 update-source Loopback0
> > neighbor 124.1.29.2 remote-as 200
> > no auto-summary
> > !
> > ip classless
> >
> > ***********************************************
> > *Rack1R9#show mpls ldp bindings*
> > lib entry: 12.0.0.0/16, rev 9
> > local binding: label: imp-null
> > remote binding: lsr: 124.1.29.2:0, label: 58
> > lib entry: 12.1.0.0/16, rev 10
> > local binding: label: imp-null
> > lib entry: 12.2.0.0/16, rev 11
> > local binding: label: imp-null
> > lib entry: 12.3.0.0/16, rev 12
> > local binding: label: imp-null
> > lib entry: 64.1.0.0/16, rev 16
> > remote binding: lsr: 124.1.29.2:0, label: 57
> > lib entry: 64.1.5.5/32, rev 13
> > remote binding: lsr: 124.1.29.2:0, label: 35
> > lib entry: 64.1.6.6/32, rev 14
> > remote binding: lsr: 124.1.29.2:0, label: 36
> > lib entry: 124.1.9.9/32, rev 8
> > local binding: label: imp-null
> > remote binding: lsr: 124.1.29.2:0, label: 61
> > lib entry: 124.1.29.0/24, rev 7
> > local binding: label: imp-null
> >
> > *Rack1R9#show mpls ldp neighbor*
> > Peer LDP Ident: 124.1.29.2:0; Local LDP Ident 124.1.9.9:0
> > TCP connection: 124.1.29.2.646 - 124.1.29.9.11000
> > State: Oper; Msgs sent/rcvd: 16/18; Downstream
> > Up time: 00:03:59
> > LDP discovery sources:
> > ATM4/0.29, Src IP addr: 124.1.29.2
> > Addresses bound to peer LDP Ident:
> > 124.1.29.2
> >
> > *Rack1R9#show mpls ip binding*
> > 12.0.0.0/16
> > in label: imp-null
> > out label: 58 lsr: 124.1.29.2:0
> > 12.1.0.0/16
> > in label: imp-null
> > 12.2.0.0/16
> > in label: imp-null
> > 12.3.0.0/16
> > in label: imp-null
> > 64.1.0.0/16
> > out label: 57 lsr: 124.1.29.2:0
> > 64.1.5.5/32
> > out label: 35 lsr: 124.1.29.2:0
> > 64.1.6.6/32
> > out label: 36 lsr: 124.1.29.2:0
> > 124.1.9.9/32
> > in label: imp-null
> > out label: 61 lsr: 124.1.29.2:0
> > 124.1.29.0/24
> > in label: imp-null
> >
> >
> > *Rack1R9#show ip cef 64.1.5.5*
> > 64.1.5.5/32
> > nexthop 124.1.29.2 ATM4/0.29
> >
> > *Rack1R9#show mpls forwarding-table*
> > Local Outgoing Prefix Bytes Label Outgoing Next Hop
> > Label Label or VC or Tunnel Id Switched interface
> >
> > ***********************************************
> >
> > I reloaded the router too..
> >
> >
> > --
> >
> > *Thanks & Regards,*
> > *John*
> >
> >
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Received on Tue Aug 24 2010 - 11:59:27 ART