From: Bob Usa (boby2kusa@hotmail.com)
Date: Sun Feb 16 2003 - 15:54:14 GMT-3
Check the dynamic frame-relay pvc to ip mapping, maybe it snuck up on you
before you turned off frame-relay inverse arp. show frame map.
>From: Hunt Lee <ciscoforme3@yahoo.com.au>
>Reply-To: Hunt Lee <ciscoforme3@yahoo.com.au>
>To: ccielab@groupstudy.com
>Subject: Frame-relay mystery
>Date: Sun, 16 Feb 2003 23:53:56 +1100 (EST)
>
>Hi friends,
>
>I have a little confusion in a very simple FR setup (hub & spoke
>topology)... all 3
>are in OSPF (not that I think it would have any affect on this ;)
>
>R3 R5
> \ /
> R1
>
>IP Addressing:
>
>R1 - 137.20.101.1/24
>R3 - 137.20.101.3/24
>R5 - 137.20.101.5/24
>
>
>I don't understand that even if each of my spoke ONLY has a frame-relay map
>ip
>statement pointing to the hub (R1), that they somehow can still managed to
>ping each
>other!!!
>
>On R1 (hub)
>
>R1#sh run
>Building configuration...
>
>Current configuration : 1868 bytes
>!
>interface Serial0/0
> no ip address
> encapsulation frame-relay
> no ip mroute-cache
> no fair-queue
>!
>interface Serial0/0.1 multipoint
> ip address 137.20.101.1 255.255.255.0
> ip access-group blockR6 in
> ip ospf network point-to-multipoint
> frame-relay map ip 137.20.101.3 103 broadcast
> frame-relay map ip 137.20.101.5 105 broadcast
> no frame-relay inverse-arp
>!
>end
>
>On R3 (spoke)
>
>interface Serial0
> ip address 137.20.101.3 255.255.255.0
> encapsulation frame-relay
> ip ospf network point-to-multipoint
> no ip mroute-cache
> frame-relay map ip 137.20.101.1 301 broadcast
> no frame-relay inverse-arp
> bridge-group 1
>end
>
>On R5 (other spoke)
>
>R5#sh run
>Building configuration...
>
>!
>interface Serial0
> ip address 137.20.101.5 255.255.255.0
> encapsulation frame-relay
> ip ospf network point-to-multipoint
> no fair-queue
> clockrate 64000
> frame-relay map ip 137.20.101.1 501 broadcast
> no frame-relay inverse-arp
>!
>end
>
>R3#ping 137.20.101.5
>
>Type escape sequence to abort.
>Sending 5, 100-byte ICMP Echos to 137.20.101.5, timeout is 2 seconds:
>!!!!!
>Success rate is 100 percent (5/5), round-trip min/avg/max = 116/118/128 ms
>R3#
>
>R5#ping 137.20.101.3
>
>Type escape sequence to abort.
>Sending 5, 100-byte ICMP Echos to 137.20.101.3, timeout is 2 seconds:
>!!!!!
>Success rate is 100 percent (5/5), round-trip min/avg/max = 116/138/220 ms
>R5#
>
>Yet, I was expecting that the spoke, without the additional frame-relay map
>ip
>statement pointing with each other, should not be able to ping each
>other... (apart
>from able to ping the hub).
>
>Anyone has any clue on this?
>
>Regards,
>L.
>
>
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This archive was generated by hypermail 2.1.4 : Sat Mar 01 2003 - 11:06:25 GMT-3