06-04-2012 06:55 PM - edited 03-07-2019 07:03 AM
I have a Catalyst 4006 switch in a test environment which I have setup as per the below link. The setup works fine but I have a few queries.
http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a0080094959.shtml
a) When I execute the command show interfaces port-channel 10, it displayes it as Half-duplex, Unknown Speed, Media type unknown, Force link-up.
Is it a normal behaviour?
b) The command show port channel on the Supervisor, shows "3/1 Not directly connected to switch"
What does it mean?
Console> (enable) show module
Mod Slot Ports Module-Type Model Sub Status
--- ---- ----- ------------------------- ------------------- --- --------
1 1 2 1000BaseX Supervisor WS-X4013 no OK
2 2 6 1000BaseX Ethernet WS-X4306 no ok
3 3 34 Router Switch Card WS-X4232-L3 no ok
4 4 24 10/100/1000 Ethernet WS-X4424-GB-RJ45 no ok
Router#show interfaces port-channel 10
Port-channel10 is up, line protocol is up
Hardware is GEChannel, address is 0007.84e4.7809 (bia 0000.0000.0000)
MTU 1500 bytes, BW 2000000 Kbit, DLY 10 usec, rely 255/255, load 1/255
Encapsulation ARPA, loopback not set, keepalive set (10 sec)
Half-duplex, Unknown Speed, Media type unknown, Force link-up
------------------------------------------------------------------------------
Console> (enable) show port channel
Port Status Channel Admin Ch
Mode Group Id
----- ---------- -------------------- ----- -----
3/1 connected on 123 833
3/2 connected on 123 833
----- ---------- -------------------- ----- -----
Port Device-ID Port-ID Platform
----- ------------------------------- ------------------------- ----------------
3/1 Not directly connected to switch
3/2 Router GigabitEthernet4 cisco Cat4232L3
----- ------------------------------- ------------------------- ---------------
06-04-2012 07:36 PM
Hello,
The first thing to check/rule out is the following cosmetic issue documented under DDTS CSCdp04017.
When channeling in the ON mode, the ports show the neighbor information using CDP data.
The IOS sends out CDP packets on both channel interfaces and physical interfaces ...
One of the cat ports sees multiple CDP neighbors and reports 'not directly connected'.
You can try configuring port-channel mode to desirable on both sides of the links to see if it changes situation.
You can also try disabling cdp
Regarding the "Half-duplex, Unknown Speed, Media type unknown, Force link-up" it can be a trace of the problem explained above. Try workarounds suggested and then see if you still see same. If yes - check if other side is configured with half duplex and negotiation is correct.
Collect
- what is connected to the other side of Po?
on IOS:
show int po10
show int gi3/1
show int gi3/1
sh run int po10
sh run int gi3/1
sh run int gi3/2
on catos:
show port 3/1
show port 3/2
show port-channel
sh conf mod 3
Nik
06-10-2012 10:38 PM
Thanks Nikolay for the workaround.
Disabling CDP resolved one issue. However the following command still shows the channel as half duplex with unknown speed.
Router#show interfaces port-channel 10
But on IOS the command show int gi3 and show int gi3 lists it as 1gbps with full duplex.
Similarly on cat os 3/1 and 3/2 is listed as 1gbps with full duplex.
06-13-2012 10:59 PM
Where can I find the cosmetic issue documented under DDTS CSCdp04017 ?
06-13-2012 11:09 PM
Hi,
You can read it here:
Kind Regards,
Ivan
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