On a partition with AIX 5300-11-01-0944.
1 etherchannel ent9 with aggregation ent3/ent7.
Code:
# lsdev |grep ent
...
ent3 Available 07-01 4-Port 10/100/1000 Base-TX PCI-Express Adapter (14106803)
...
ent7 Available 0A-01 4-Port 10/100/1000 Base-TX PCI-Express Adapter (14106803)
...
ent9 Available EtherChannel / IEEE 802.3ad Link Aggregation
When I physically disconnect the cable from ent3 and that I reconnect it, it does not go up. The led with the back of the chart remain extinct.
With the restarting of the partition all is OK.
Below some infos on the state of the etherchannel and the errpt.
After deconnection:
Code:
# errpt |pg
EC0BCCD4 0331011510 T H ent3 ETHERNET DOWN
# entstat -d ent9
ETHERNET STATISTICS (ent3) :
....
Link Status: UNKNOWN
Media Speed Selected: 1000 Mbps Full Duplex
Media Speed Running: Unknown
# errpt |pg
F3931284 0331011610 I H ent3 ETHERNET NETWORK RECOVERY MODE
EC0BCCD4 0331011510 T H ent3 ETHERNET DOWN
# entstat -d ent9
ETHERNET STATISTICS (ent3) :
....
Link Status: Up
Media Speed Selected: 1000 Mbps Full Duplex
Media Speed Running: 1000 Mbps Full Duplex
Have you an idea ?
Thanks.
Last edited by zxmaus; 04-20-2010 at 06:38 AM..
Reason: added code tags
Are the "lossless_failover" and "auto_recovery" attributes for your etherchannel set similar to those below? I have done the "pull-the-plug-out-and-see-if-it-still-works-test" before and I have had good results with etherchannels. Even removing one cable, waiting a few seconds, reinserting it, waiting a few seconds, then removing the second cable didn't cause the box to lose its network connection. I did see errors in the errpt but it still worked. I am also running 6.1 so that may make a difference.
have you setup a primary and a backup adapter - or two primary adapters (link aggregation). Have you put in an 'ip to ping' and are you using different switches in the same subnet or a single switch?
Was your system always AIX 5.3 or was it initially setup in an earlier AIX version ?
Check if your adapters both have link polling enabled to detect link failure. Some adapters cannot automatically detect their link status and need to have link polling enabled - but it is disabled by default because it decreases performance.
Before creating the EtherChannel, use the following command on every adapter to be included in the channel:
Code:
chdev -l entX -a poll_link=yes
It might be as well helpful for us to see your settings ?
Hello,
POWER7 machine.
4 x 1Gbit port ethernet adapter is dedicated to vios. 8023ad etherchannel is created using those 4 ports. Etherchannel adapter is shared to lpars using SEA.
If I test network performance directly from vios partition (using iperf) I'm geting nice 4Gbit throughput. But if... (3 Replies)
bonjour,
j'ai un serveur Linux ayant 2 interfaces eth0 et eth1. j'ai configuré deux adresses IP de deux réseaux différents sur les 2 interfaces, et je les ai connecté sur 2 commutateurs différents.
l'adresse IP de eth0 répond sans problème au ping des équipement de son réseau d'appartenance, malheureusement cela... (1 Reply)
Hi Guys,
I am trying to test an etherchannel failover and switchback.
I did failover from primary to backup adapter, but now I am not able to switch it back to primary.
phcxxxxx:/ > entstat -d ent4 | grep Active
Active channel: backup adapter ... (1 Reply)
Hi,
I have a AIX5.3 P6-520 with 8x1Gb Ethernet ports with possible connections to 2 CISCO 2960 switches.
I can create 8023ad Etherchannels which work correctly with the switches (I have set up for LACP passive and a valid channels)
But can create 2x 8023ad 4Gb Etherchannels with no backups.... (2 Replies)
I have few AIX servers in my data center, which have their EtherChannel configured to have a fat pipe (active/active) and a nagios server to monitor the server uptimes. Nagios server pings every server in the data center and we have pretty much every known unix flavor in this data center. When... (3 Replies)
I have one p5 server, no lpar, 2 physical network adapter, bundle as one EtherChannel. The two 2 physical network adapter connect to 2 network switches.
How to make this as a redundancy config?
Current is if one physical network adapter down, the seond one will go through the network. but if... (2 Replies)
I have 1 AIX server, 4 dual ported fiber attached ethernet cards and 4 VLANS coming in. Is it possible to present those 8 ports as 1 IP address using etherchannel? Thanks. (5 Replies)
I'm trying to configure Etherchannel on AIX 5.3 and I'm having some problems. I am aggregating both of the onboard NIC's (ent0 and ent1) into a new adapter ent2 for failover reasons obviously. At first I was experiencing a problem where about 50% of all my packets would be dropped. Then after... (4 Replies)
Problem description:
On the condition of EtherChannel function of AIX, when the data exchange between the nodes on the network, there sometimes lost datat packets and cause the application failed. Once we deconfig EtherChannel and use the single adapter configuration, the application works... (0 Replies)
