IPS Interface duplex - Half/Full??

Unanswered Question
Oct 29th, 2008

i have a IPS 4260, running Version 6.0(5)E2.

I have noticed different duplex on the interface.

My understanding based on the logs below:

The interface below seems to be running in half duplex, but they are configured for full duplex.

-GigabitEthernet2/0

-GigabitEthernet2/3

-GigabitEthernet3/3

Is there any misconfiguration or a problem on my IPS?

extract from "show tech-support" command:

MAC statistics from interface GigabitEthernet2/0

Link Status = Up

Link Speed = 100

Link Duplex = Half

MAC statistics from interface GigabitEthernet2/1

Link Status = Up

Link Speed = 100

Link Duplex = Full

MAC statistics from interface GigabitEthernet2/2

Link Status = Up

Link Speed = 100

Link Duplex = Full

MAC statistics from interface GigabitEthernet2/3

Link Status = Up

Link Speed = 100

Link Duplex = Half

MAC statistics from interface GigabitEthernet3/0

Link Status = Down

Link Speed = N/A

Link Duplex = N/A

MAC statistics from interface GigabitEthernet3/1

Link Status = Down

Link Speed = N/A

Link Duplex = N/A

MAC statistics from interface GigabitEthernet3/2

Link Status = Up

Link Speed = 100

Link Duplex = Full

MAC statistics from interface GigabitEthernet3/3

Link Status = Up

Link Speed = 100

Link Duplex = Half

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Oct 29 18:40:04 sensor user.info kernel: e1000: ge2_0 NIC Link is Down

Oct 29 18:40:07 sensor user.info kernel: e1000: ge2_0 NIC Link is Up 100 Mbps Half Duplex

Oct 29 18:40:08 sensor user.info kernel: e1000: ge2_0 NIC Link is Down

Oct 29 18:40:08 sensor user.info kernel: e1000: ge2_1 NIC Link is Down

Oct 29 18:40:15 sensor user.info kernel: e1000: ge2_1 NIC Link is Up 100 Mbps Full Duplex

Oct 29 18:40:37 sensor user.info kernel: e1000: ge2_0 NIC Link is Up 100 Mbps Half Duplex

Oct 29 18:40:37 sensor user.info kernel: e1000: ge2_0 NIC Link is Down

Oct 29 18:40:37 sensor user.info kernel: e1000: ge2_1 NIC Link is Down

Oct 29 18:40:37 sensor user.info kernel: e1000: ge2_1 NIC Link is Up 100 Mbps Full Duplex

Oct 29 18:40:40 sensor user.info kernel: e1000: ge2_0 NIC Link is Up 100 Mbps Half Duplex

Oct 29 18:40:43 sensor user.info kernel: e1000: ge2_0 NIC Link is Down

Oct 29 18:40:43 sensor user.info kernel: e1000: ge2_1 NIC Link is Down

Oct 29 18:40:43 sensor user.info kernel: e1000: ge2_1 NIC Link is Up 100 Mbps Full Duplex

Oct 29 18:40:43 sensor user.debug kernel: Set Affinity to 1

Oct 29 18:42:48 sensor user.info kernel: e1000: ge2_0 NIC Link is Up 100 Mbps Half Duplex

Oct 29 18:42:48 sensor user.info kernel: e1000: ge2_0 NIC Link is Down

Oct 29 18:42:48 sensor user.info kernel: e1000: ge2_1 NIC Link is Down

Oct 29 18:42:48 sensor user.info kernel: e1000: ge2_1 NIC Link is Up 100 Mbps Full Duplex

Oct 29 18:42:49 sensor user.info kernel: e1000: ge2_0 NIC Link is Up 100 Mbps Full Duplex

Oct 29 18:42:49 sensor user.debug kernel: Set Affinity to 1

Oct 29 18:42:49 sensor user.info kernel: e1000: ge2_0 NIC Link is Down

Oct 29 18:43:10 sensor user.info kernel: e1000: ge2_2 NIC Link is Up 100 Mbps Half Duplex

Oct 29 18:43:10 sensor user.info kernel: e1000: ge2_3 NIC Link is Down

Oct 29 18:43:10 sensor user.info kernel: e1000: ge2_2 NIC Link is Down

Oct 29 18:43:10 sensor user.info kernel: e1000: ge2_3 NIC Link is Up 100 Mbps Half Duplex

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Physical Config

ID Name Pair Logic Reset Admin Speed Duplex Mode

0 ge0_1 0 0 n/a down Auto Auto Prom

1 ge3_1 2 19 n/a up Auto Auto Pair (HW Bypass)

2 ge3_0 1 19 n/a up Auto Auto Pair (HW Bypass)

3 ge3_3 4 17 n/a up 100 Full Pair

4 ge3_2 3 17 n/a up 100 Full Pair

5 ge2_1 6 18 n/a up 100 Full Pair

6 ge2_0 5 18 n/a up 100 Full Pair

7 ge2_3 8 16 n/a up 100 Full Pair

8 ge2_2 7 16 n/a up 100 Full Pair

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sadbulali Tue, 11/04/2008 - 07:00

Check the interface configuration for Link Duplex configuration as the command "show tech-support" will show the interface parameters as per the configuration done. So the output of this command completely depends on the configuration that has been done and is existing. So when the interface is configured as "full" for link duplex it will show as full and not the other way.

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