Re: [mpls-linux-general] why no label distribution

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Summary:
OSPF is not forming an adj.  I'd debug that first.  I think LDP will
start to work once you have an OSPF adj.

More comments inline.

On Mon, Aug 11, 2003 at 04:48:55AM -0700, Zahra Farahmand wrote:
> Hi james,
> Thanks alot for your help,
> I did all of you said step by step:
> at first remove all routes and interfaces addresses on
> both machines:
> [root@laleh root]# ip route flush scope global type
> unicast
> [root@laleh root]# ip addr flush eth0
> are these command are enough?

That looks good.

> I started zebra,ospf and mplsd on each machine:
> on comp A(192.168.2.207)
> [root@laleh sbin]# ./zebra -f /etc/zebra.conf -P 1024
> -d
> [root@laleh sbin]# ./ospfd -f /etc/ospfd.conf -P 1025
> -d
> [root@laleh sbin]# ./mplsd -f /etc/mplsd.conf -P 1026
> rsvpte_vty_init
> 2003/08/11 02:25:51 MPLS: MPLSd (0.94) starts
> 2003/08/11 02:25:51 MPLS: interface add lo index 1
> flags 73 metric 1 mtu 16436
> 2003/08/11 02:25:51 MPLS: address add 127.0.0.1 to
> interface lo
> 2003/08/11 02:25:51 MPLS: interface add dummy0 index 2
> flags 195 metric 1 mtu 1500
> 2003/08/11 02:25:51 MPLS: address add 192.168.50.1 to
> interface dummy0
> 2003/08/11 02:25:51 MPLS: interface add eth0 index 3
> flags 4163 metric 1 mtu 1500
> 2003/08/11 02:25:51 MPLS: address add 192.168.2.207 to
> interface eth0
> 2003/08/11 02:25:51 MPLS: router-id change
> 192.168.50.1
> 2003/08/11 02:25:51 MPLS: router-id update
> 192.168.50.1
> 2003/08/11 02:25:51 MPLS: route add 192.168.2.0/24
> 2003/08/11 02:25:51 MPLS:       ifindex 3
> 2003/08/11 02:25:51 MPLS: route add 192.168.50.1/32
> 2003/08/11 02:25:51 MPLS:       ifindex 2
> 
> on comp B(192.168.2.213)
> [root@laleh sbin]# ./zebra -f /etc/zebra.conf -P 1024
> -d
> [root@laleh sbin]# ./ospfd -f /etc/ospfd.conf -P 1025
> -d
> [root@laleh sbin]# ./mplsd -f /etc/mplsd.conf -P 1026
> rsvpte_vty_init
> 2003/08/11 02:53:06 MPLS: MPLSd (0.94) starts
> 2003/08/11 02:53:06 MPLS: interface add lo index 1
> flags 73 metric 1 mtu 16436
> 2003/08/11 02:53:06 MPLS: address add 127.0.0.1 to
> interface lo
> 2003/08/11 02:53:06 MPLS: interface add eth0 index 2
> flags 4163 metric 1 mtu 1500
> 2003/08/11 02:53:06 MPLS: address add 192.168.2.231 to
> interface eth0
> 2003/08/11 02:53:06 MPLS: interface add dummy0 index 3
> flags 195 metric 1 mtu 1500
> 2003/08/11 02:53:06 MPLS: address add 192.168.50.3 to
> interface dummy0
> 2003/08/11 02:53:06 MPLS: router-id change
> 192.168.50.3
> 2003/08/11 02:53:06 MPLS: router-id update
> 192.168.50.3
> 2003/08/11 02:53:06 MPLS: route add 192.168.2.0/24
> 2003/08/11 02:53:06 MPLS:       ifindex 2
> 2003/08/11 02:53:06 MPLS: route add 192.168.50.3/32
> 2003/08/11 02:53:06 MPLS:       ifindex 3
> connect: Network is unreachable
> OUT: ldp_session_attempt_setup: MPLS_FAILURE
> connect: Network is unreachable
> OUT: ldp_session_attempt_setup: MPLS_FAILURE

Redirect the output from mplsd:

(if you use bash)
./mplsd -f /etc/mplsd.conf -P 1026 2>&1 | tee output.file

(if you use csh or tcsh)
./mplsd -f /etc/mplsd.conf -P 1026 |& tee output.file

> I telnet to zebra, ospf and mplsd for each machine.
> In zebra I did a 'show ip route' and 'show router-id'
> on each machine:
> on comp A:
> uml-1# sho ip route
> Codes: K - kernel route, C - connected, S - static, R
> - RIP, O - OSPF,
>        B - BGP, > - selected route, * - FIB route
> 
> K * 127.0.0.0/8 is directly connected, lo
> C>* 127.0.0.0/8 is directly connected, lo
> C>* 192.168.2.0/24 is directly connected, eth0
> O   192.168.50.1/32 [110/10] is directly connected,
> dummy0, 00:01:00
> C>* 192.168.50.1/32 is directly connected, dummy0
> uml-1# sho router-id
> router-id: 192.168.50.1
> 
> on comp B:
> uml-1# sho ip route
> Codes: K - kernel route, C - connected, S - static, R
> - RIP, O - OSPF,
>        B - BGP, > - selected route, * - FIB route
> 
> K * 127.0.0.0/8 is directly connected, lo
> C>* 127.0.0.0/8 is directly connected, lo
> C>* 192.168.2.0/24 is directly connected, eth0
> O   192.168.50.3/32 [110/10] is directly connected,
> dummy0, 00:02:15
> C>* 192.168.50.3/32 is directly connected, dummy0
> uml-1# sho router-id
> router-id: 192.168.50.3
> 
> 
> At the linux shell I can ping across the ethernet
> subnet.

Did you configure OSPF?

router ospf
network 192.168.0.0/16 area 0
passive-interface dummy0

> In ospfd I did a 'sho ip ospf nei':
> on comp A:
> uml-1-ospf# sho ip ospf nei
> 
> Neighbor ID     Pri   State           Dead Time  
> Address         Interface
>       RXmtL RqstL DBsmL
> 
> on comp B:
> uml-1-ospf# sho ip ospf nei
> 
> Neighbor ID     Pri   State           Dead Time  
> Address         Interface
>       RXmtL RqstL DBsmL

Since there is not an OSPF adj I would start trouble shooting that.
The rest of the output is consistent with no OSPF adj.

> >From the linux shell I can't ping the router-id th
> other machine:
> [root@laleh root]# ping 192.168.50.3
> connect: Network is unreachable
> But before starting zebra, ospf and mplsd, when I
> ping, there were responses:
> [root@laleh root]# ping 192.168.50.1
> PING 192.168.50.1 (192.168.50.1) from 192.168.2.231 :
> 56(84) bytes of data.
> >From 217.218.158.42 icmp_seq=1 Time to live exceeded
> >From 217.218.158.42 icmp_seq=2 Time to live exceeded
> >From 217.218.158.42 icmp_seq=4 Time to live exceeded
> >From 217.218.158.42 icmp_seq=5 Time to live exceeded
> 
> 
> In mplsd, I did a 'sho ldp' and 'sho ldp nei':
> comp A:
> uml-1# sho ldp
> LSR-ID: c0a83201 Admin State: ENABLED
> Transport Address: c0a83201
> Control Mode: ORDERED   Repair Mode: GLOBAL
> Propogate Release: TRUE Label Merge: TRUE
> Retention Mode: LIBERAL Loop Detection Mode: NONE
> TTL-less-domain: FALSE
> Local TCP Port: 646     Local UDP Port: 646
> Keep-alive Time: 45     Keep-alive Interval: 15
> Hello Time: 15  Hello Interval: 5
> uml-1# sho ldp nei
> Peer LDP Ident: 192.168.50.3:0; Local LDP Ident:
> 192.168.50.1:0
>         TCP connection: n/a
>         State: discovery; Msgs sent/recv: -/-;
>         Up time: -
>         LDP discovery sources:
>           eth0
> 
> uml-1# sho ldp session
>     no established sessions
> uml-1# sho ldp database
>     no labeling info has been exchanged
> 
> comp B:
> uml-1# sho ldp
> LSR-ID: c0a83203 Admin State: ENABLED
> Transport Address: c0a83203
> Control Mode: ORDERED   Repair Mode: GLOBAL
> Propogate Release: TRUE Label Merge: TRUE
> Retention Mode: LIBERAL Loop Detection Mode: NONE
> TTL-less-domain: FALSE
> Local TCP Port: 646     Local UDP Port: 646
> Keep-alive Time: 45     Keep-alive Interval: 15
> Hello Time: 15  Hello Interval: 5
> uml-1# sho ldp nei
> Peer LDP Ident: 192.168.50.1:0; Local LDP Ident:
> 192.168.50.3:0
>         TCP connection: 0.0.0.0.646 - 192.168.50.1.646
>         State: NON-EXIST; Msgs sent/recv: 0/0;
> UNSOLICITED
>         Up time: 12275d 07:03:59
>         LDP discovery sources:
>           eth0
>         Addresses bound to peer:
> 
> uml-1# sho ldp session
> 1  192.168.50.1 0   NON-EXIST
> uml-1# sho ldp database
>     no labeling info has been exchanged
> 
> 
> I don't know how to redirect the output of mplsd to a
> file(it's very simple question, sorry)
> Why there is no label distributed?!
> 
> I really appreciate your help.
> Thanking in advance.
> 
> Regards,
> Z-Farahmand
> 
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-- 
James R. Leu