From: Hunt Lee (ciscoforme3@yahoo.com.au)
Date: Sun Feb 16 2003 - 09:53:56 GMT-3
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 - 11:06:24 GMT-3