From: Neil Moore (neil@droopy.com)
Date: Sun Dec 22 2002 - 02:27:18 GMT-3
What does the mac address look like on the one that you can not ping?
----------------------------------------
Neil Moore CCIE#10044
----- Original Message -----
From: "cebuano" <cebu2ccie@cox.net>
To: <ccielab@groupstudy.com>
Sent: Saturday, December 21, 2002 11:44 PM
Subject: RE: Very Strange Problem....Any Ideas? [7:59682]
> 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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