From: cebuano (cebu2ccie@cox.net)
Date: Sun Dec 22 2002 - 01:44:41 GMT-3
Well, in both cases, only one switch was actually connected at one time
to the TFTP server. One cable to one server NIC. Still doesn't make
sense why it would take one network config and not another.
As far as Sara Li's suggestion of turning on "ip routing", I'll try it
next time I wipe out the configs, although I don't see why this should
be a factor as configuring the switch for L2 functions only will not
have any effect on this strange problem.
Thanks for the insights.
Neil, I'll keep a note of your observations as this just might save my
day (or job) in the future.
Elmer
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Neil Moore
Sent: Saturday, December 21, 2002 10:48 PM
To: cebuano; ccielab@groupstudy.com
Subject: Re: Very Strange Problem....Any Ideas? [7:59682]
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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