Re: OSPF Virtual links.

From: CiscoCCNP3@xxxxxxx
Date: Wed Apr 03 2002 - 18:40:28 GMT-3


   
hiya,

In a message dated 4/3/02 4:07:34 PM Eastern Standard Time,
steven.j.nelson@bt.com writes:

> My question is this :-
>
> Is it enough to have the command area 0 authentication message-digest
> confgured under R1's routing process and the relevant passwords on the
>

here i have authentication on the transit area link to area 0 from my current
setup, (actually from Solie's Enchilada lab)

    (area0)p2m frame----s0.1--r1--s0.2-----p2p frame (area 10) ---r7---area 70

R1
interface Serial0.1 multipoint
 description to P2M FRAME R2/R3
 ip address 155.100.13.1 255.255.255.0
 ip ospf authentication-key cisco
<edit>
interface Serial0.2 point-to-point
 description to P2P FRAME R7
 ip address 155.100.17.1 255.255.255.0
<edit>
router ospf 1
 router-id 1.1.1.1
 log-adjacency-changes
 area 0 authentication message-digest
 area 10 virtual-link 7.7.7.7

R7
interface Serial0/0
 bandwidth 64
 ip address 155.100.17.7 255.255.255.0
 ip ospf authentication-key cisco
 ip ospf network point-to-point
<edit>
router ospf 7
 router-id 7.7.7.7
 log-adjacency-changes
 area 0 authentication message-digest
 area 10 virtual-link 1.1.1.1
 network 155.100.7.7 0.0.0.0 area 10
 network 155.100.17.0 0.0.0.255 area 10
 network 155.100.70.0 0.0.0.255 area 70

the key is to see the hellos supressed on the sh ip os virtual-link

R1#sh ip ospf virt
Virtual Link OSPF_VL0 to router 7.7.7.7 is up
  Run as demand circuit
  DoNotAge LSA allowed.
  Transit area 10, via interface Serial0.2, Cost of using 64
  Transmit Delay is 1 sec, State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:04
    Adjacency State FULL (Hello suppressed)
    Index 3/4, retransmission queue length 0, number of retransmission 1
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 1, maximum is 1
    Last retransmission scan time is 0 msec, maximum is 0 msec
  Message digest authentication enabled
      No key configured, using default key id 0
R1#
CC_R7#sh ip osp virt
Virtual Link OSPF_VL2 to router 1.1.1.1 is up
  Run as demand circuit
  DoNotAge LSA allowed.
  Transit area 10, via interface Serial0/0, Cost of using 1562
  Transmit Delay is 1 sec, State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:01
    Adjacency State FULL (Hello suppressed)
    Index 1/2, retransmission queue length 0, number of retransmission 1
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 1, maximum is 1
    Last retransmission scan time is 0 msec, maximum is 0 msec
  Message digest authentication enabled
      No key configured, using default key id 0
CC_R7#

hope that helps, 6 days to RTP

peace \/

joey r / r|p



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