Actually - the arp cache contains NO entries for the hub workstations
(and to my knowledge a standard layer one hub has no MAC address).
I haven't verified that the crossover cable is correct (I went on the
clients word) - but since the switchport reported up/up - I assumed it
was correct (in my experience if you use a bad cable the port will not
come up).
Still leaning toward a layer one explanation tho.
Thanks to everyone for their responses - go CCIE!
Don Dettmore
CCNP, MCSE, CNE
>>> "[EMAIL PROTECTED]" 07/12/00 08:07AM >>>
/ Question here:
You say if you have six hosts (workstations) and the hub you have 7
MAC
addresses.
Now I understand the six workstations have NICs. But does the hub
port also
have a NIC?
Would a printer connected to the same hub port have a NIC also? I
understand that the hub port and printer would each be considered a
host.
So does this mean that all hosts also have NICs?
Dick Silva
-----Original Message-----
From: Chris H <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>;
[EMAIL PROTECTED]
<[EMAIL PROTECTED]>; [EMAIL PROTECTED]
<[EMAIL PROTECTED]>
Date: Tuesday, July 11, 2000 10:53 PM
Subject: RE: connectivity problem
>
>The ARP cache should contain all MAC addresses for the port you have
the
hub
>connected to. So for the sake of arguement, you have 6
workstations
>connected to that hub, the switch should cache 7 MAC addresses, the
6
>workstations and the hub.
>
>show ip arp fastethernet [port number]
>
>Make sure you also have spanning tree enabled on that port. If it
doesn't
>work, like someone else said, check layer 1, replace the hub, etc.
etc.
>etc....
>
>I also know that the old Bay hubs have some type of Management Menu
driven
>code loaded as well. I'm not sure if you have to specify an uplink
port or
>what, but you may want to check the hub itself.
>
>
>Chris
>
>>From: Daniel Cotts <[EMAIL PROTECTED]>
>>Reply-To: Daniel Cotts <[EMAIL PROTECTED]>
>>To: "'Don Dettmore'" <[EMAIL PROTECTED]>,
[EMAIL PROTECTED]
>>Subject: RE: connectivity problem
>>Date: Tue, 11 Jul 2000 09:52:18 -0500
>>
>>Maybe a layer one problem?
>>Seems that the switch can see the hub. The hub can't see the
switch. Do
you
>>have link both ends? Have you substituted the patch cable between
them?
>>Alternatively do you have a packet analyzer such as EtherPeek to
stick in
>>the hub to see if it sees the pings, arp requests from the switch
side?
>>
>> > -----Original Message-----
>> > From: Don Dettmore [mailto:[EMAIL PROTECTED]]
>> > Sent: Tuesday, July 11, 2000 8:04 AM
>> > To: [EMAIL PROTECTED]
>> > Subject: connectivity problem
>> >
>> >
>> > Here is an interesting problem.
>> >
>> > I have a client with a Cisco 2924XL switch. Most stations are
>> > directly connected to the switch, however off of one of the
switch
>> > ports is an old Bay 10mb/s hub.
>> >
>> > The problem is that stations connected to the hub cannot
communicate
>> > with stations connected to the switch. Switch stations CAN
>> > communicate with switch stations, and hub stations CAN
communicate
>> > with hub stations.
>> >
>> > The switch port connected to the hub appears to recognize the
hub -
>> > it is up/up and has detected 10mb half duplex. I tried
manually
>> > entering these settings with no effect.
>> >
>> > It appears to be an arp problem - if I debug arp and then try to
ping
>> > a station connected to the hub, arps are sent out, but no replys
are
>> > received. This happens whether the switch itself tries to ping
a hub
>> > host, or a if a switch station does so. Interestingly enough
tho, if
>> > a hub station pings another hub station, the arp shows up on
the
>> > switch debug console - it is definitely seeing the traffic!
>> >
>> > Any suggestions would be greatly appreciated.
>> >
>> > Thanks!
>> >
>> > Don Dettmore
>> > CCNP, MCSE, CNE
>> >
>> > ___________________________________
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