Cisco Router IOS XR Manuale Utente Scaricare il pdf (Pagina 77)

Cisco IOS XR Training Page 77

Now here is something different than normal IOS, as soon as you enable

authentication – the LDP session resets and enables the password. With IOS,

you would need to clear the LDP session and allow it to re-establish.

RP/0/7/CPU0:Apr 1 19:40:06.205 : tcp[400]: %IP-TCP-3-BADAUTH : Invalid MD5

digest from 2.2.2.2:57032 to 1.1.1.1:646

Ok, I made the change to R2 so the passwords match, now we can look at our

neighbor

RP/0/7/CPU0:R1#sh mpls ldp neighbor

Sun Apr 1 19:40:33.961 UTC

Peer LDP Identifier: 2.2.2.2:0

TCP connection: 2.2.2.2:57491 - 1.1.1.1:646; MD5 on

Graceful Restart: No

Session Holdtime: 180 sec

State: Oper; Msgs sent/rcvd: 7/18; Downstream-Unsolicited

Up time: 00:00:10

LDP Discovery Sources:

GigabitEthernet0/3/0/2

Addresses bound to this peer:

2.2.2.2 150.1.12.2 200.100.200.100 200.200.200.200

200.200.200.201 200.200.200.202 200.200.200.203 200.200.200.204

200.200.200.205 200.200.200.206 200.200.200.207 200.200.200.208

200.200.200.209 200.200.200.210

RP/0/7/CPU0:R1#

As you can see, next to the TCP connection, it now says MD5 on. Previously

nothing was after the port number.

You can also configure a password for any LDP session, that is done like

follows:

RP/0/7/CPU0:R1#conf t

Sun Apr 1 19:40:45.561 UTC

RP/0/7/CPU0:R1(config)#mpls ldp

RP/0/7/CPU0:R1(config-ldp)#neighbor ?

A.B.C.D IP address of neighbor

password Configure password for MD5 authentication for all neighbors

RP/0/7/CPU0:R1(config-ldp)#neighbor password cisco

RP/0/7/CPU0:R1(config-ldp)#comm

Sun Apr 1 19:40:57.167 UTC

Now any LDP session must have a password. Now remember this in case you need

to do directed LDP session some time down the road.

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Cisco Router IOS XR Manuale Utente Pagina 77