PE2950/RHEL5 and slow bonding!

[Daniel Huntley]

I'm using a 6509-E Chassis with Gigabit Ethernet modules as well as
Cisco 2960's in other locations

Below config is pretty much standard for any Cisco Switch. I use this
same config on both the 6509 and for Cisco 2960's

The configuration for the cisco switches is below. Note the
configuration for the 2 interfaces to create the etherchannel which is
Port-Channel10


Interfaces

interface GigabitEthernet3/31
 switchport
 switchport access vlan x
 no ip address
 speed 1000
 duplex full
 spanning-tree portfast
 channel-protocol lacp
 channel-group 10 mode active
!
interface GigabitEthernet3/32
 switchport
 switchport access vlan x
 no ip address
 speed 1000
 duplex full
 spanning-tree portfast
 channel-protocol lacp
 channel-group 10 mode active


Port Channel

interface Port-channel10
 switchport
 switchport access vlan x
 no ip address
 spanning-tree portfast


cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.1.2 (January 20, 2007)

Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer2 (0)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

802.3ad info
LACP rate: slow
Active Aggregator Info:
        Aggregator ID: 1
        Number of ports: 2
        Actor Key: 17
        Partner Key: 1
        Partner Mac Address: 00:1b:0d:67:64:00

Slave Interface: eth0
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:19:b9:eb:58:09
Aggregator ID: 1

Slave Interface: eth1
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:19:b9:eb:58:0b
Aggregator ID: 1

Dan



-----Original Message-----
From: Smith, Cathy [mailto:cathy.smith at pnl.gov] 
Sent: Tuesday, 13 May 2008 10:33 AM
To: Daniel Huntley
Cc: linux-poweredge at lists.us.dell.com
Subject: RE: PE2950/RHEL5 and slow bonding!

Daniel

What type of Cisco switch do you use?  Can you provide the
configuration?


Regards,


Cathy
---
Cathy L. Smith
Unix Systems Administrator

Pacific Northwest National Laboratory
Operated by Battelle for the
U.S. Department of Energy

Phone:	509.375.2687
Fax:	      509.375.2330
Email:	cathy.smith at pnl.gov


Message: 2
Date: Sun, 11 May 2008 23:34:44 -0500
From: "Daniel Huntley" <Daniel.Huntley at morningstar.com>
Subject: RE: PE2950/RHEL5 and slow bonding!
To: <linux-poweredge at lists.us.dell.com>
Message-ID:
	<FF836EFF0B7CCA46B0786A1F8625EFC40A3A47C3 at msex4.morningstar.com>
Content-Type: text/plain; charset="us-ascii"

I  use bonding on all my linux (Centos) servers that have 2 x gigabit
nics.

 

I'm using mode=4 which is LACP (802.3ad)

 

If you're switches support it, most modern switches support it (we're
using Cisco), give it a go. Peformance is exactly what I would expect
from a bonded gigabit interface.

 

Be aware that the interfaces on the switch need to be setup in an
etherchannel and configured for 802.3ad so  if your not sure how to do
it talk to your network admin. It's a very simple configuration.


Dan