From: Neil Moore (neil@droopy.com)
Date: Sun Dec 22 2002 - 00:47:34 GMT-3
I have also seen something like this when the path is not symetrical. Try
this.. flip the cables going to that gateway with the other switch
This sometimes happens when:
Packet leaves switch 1 to router one..
Router 1 responds but the packet goes to switch two
Spanning tree is blocking the path back to switch 1
----------------------------------------
Neil Moore CCIE#10044
----- Original Message -----
From: "cebuano" <cebu2ccie@cox.net>
To: <ccielab@groupstudy.com>
Sent: Saturday, December 21, 2002 8:33 PM
Subject: RE: Very Strange Problem....Any Ideas? [7:59682]
> Craig,
> This reminds me of a similar problem when I first got my 3550's where it
> could ping one network but not another. I hope you don't see this when
> you do upgrade to the 3550-EMI since you're in a production environment.
>
>
> 3550-A#config t
> Enter configuration commands, one per line. End with CNTL/Z.
> 3550-A(config)#int vlan1
> 3550-A(config-if)#ip add 192.168.10.2 255.255.255.0
> 3550-A(config-if)#exit
> 3550-A(config)#ip default-gateway 192.168.10.1
> 3550-A(config)#^Z
> 3550-A#
> 00:15:38: %SYS-5-CONFIG_I: Configured from console by console
> 3550-A#ping 192.168.10.1
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 192.168.10.1, timeout is 2 seconds:
> .....
> Success rate is 0 percent (0/5)
> 3550-A#config t
> Enter configuration commands, one per line. End with CNTL/Z.
> 3550-A(config)#int vlan1
> 3550-A(config-if)#ip add 192.168.250.2 255.255.255.0
> 3550-A(config-if)#exit
> 3550-A(config)#ip default-gateway 192.168.250.1
> 3550-A(config)#^Z
> 3550-A#
> 00:16:19: %SYS-5-CONFIG_I: Configured from console by console
> 3550-A#ping 192.168.10.1
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 192.168.10.1, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 1/200/1000
> ms
> 3550-A#ping 192.168.250.1
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 192.168.250.1, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
>
>
> 3550-B(config-if)#int vlan 1
> 3550-B(config-if)#ip add 192.168.0.2 255.255.255.0
> 3550-B(config)#ip default-gateway 192.168.0.1
>
> 3550-B#ping 192.168.0.2
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 192.168.0.2, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
> 3550-B#ping 192.168.0.1
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:
> .....
>
>
> Enter configuration commands, one per line. End with CNTL/Z.
> 3550-B(config)#int vlan 1
> 3550-B(config-if)#ip add 192.168.10.2 255.255.255.0
> 3550-B(config)#ip default-gateway 192.168.10.1
>
>
> 3550-B#ping 192.168.10.2
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 192.168.10.2, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
> 3550-B#ping 192.168.10.1
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 192.168.10.1, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 1/200/1000
> ms
> .
.
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