Ethernet bonding on 2950 running RHEL4 not working quite

[Jefferson Cowart]

What is the output of "show etherchannel summary" on the switch?

--
Thank You
Jefferson Cowart
Network and Linux Systems Administrator
Libraries Information Technology 


> -----Original Message-----
> From: linux-poweredge-bounces at dell.com [mailto:linux-poweredge-
> bounces at dell.com] On Behalf Of Smith, Cathy
> Sent: Monday, February 18, 2008 15:15
> To: linux-poweredge at dell.com
> Subject: Ethernet bonding on 2950 running RHEL4 not working quite
> 
> Folks
> 
> I am trying to get Ethernet bonding mode 4, working to provide
> redundancy and performance for an Oracle RAC cluster.  The fault
> tolerance isn't working  quite as I expected.  I have bonded 2 ports
> together, eth2 and eth3.  I can take eth3, leaving eth2 up, and still
> have connectivity.  If I take eth2 down, and leave eth3 up, I lose
> connectivity.   If a single switch port is taken down, I lose  all
> connectivity.  I may not have my configuration right, or I just may
not
> understand how this bonding works.  I'd appreciate any suggestions.
> 
> I have 3 Dell 2950's running RHEL4 U6 64 bit.  The switch is a Cisco
> 3750.  The Ethernet bonding is configured for 2 ports on an Intel
> GigEthernet card.
> 
> The /etc/modprobe.conf file defines the bonding configuration as
>         alias eth2 e1000
>         alias eth3 e1000
>         alias bond0 bonding
>         options bond0 miimon=200 mode=4
> 
> I have eth2 and eth3 defined as slaves in the /etc/sysconfig/network-
> scripts.  The ifcfg-eth2 configuration:
> 
> 	DEVICE=eth2
> 	ONBOOT=yes
> 	BOOTPROTO=none
> 	USERCTL=no
> 	MASTER=bond0
> 	SLAVE=yes
> 
> The ifcfg-bond0 configuration:
> 
> 	DEVICE=bond0
> 	ONBOOT=yes
> 	BOOTPROTO=none
> 	IPADDR=192.168.42.30
> 	NETMASK=255.255.255.0
> 	USERCTL=no
> 
> The output from ifconfig:
> 
> 	bond0     Link encap:Ethernet  HWaddr 00:15:17:3E:2A:D6
> 	          inet addr:192.168.42.10  Bcast:192.168.42.255
> Mask:255.255.255.0
> 	          UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500
> Metric:1
> 	          RX packets:5416 errors:0 dropped:0 overruns:0 frame:0
> 	          TX packets:5147 errors:0 dropped:0 overruns:0
carrier:0
> 	          collisions:0 txqueuelen:0
> 	          RX bytes:566922 (553.6 KiB)  TX bytes:528332 (515.9
> KiB)
> 
> 	eth2      Link encap:Ethernet  HWaddr 00:15:17:3E:2A:D6
> 	          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500
> Metric:1
> 	          RX packets:640 errors:0 dropped:0 overruns:0 frame:0
> 	          TX packets:570 errors:0 dropped:0 overruns:0 carrier:0
> 	          collisions:0 txqueuelen:1000
> 	          RX bytes:71103 (69.4 KiB)  TX bytes:60790 (59.3 KiB)
> 	          Base address:0xdce0 Memory:de7c0000-de7e0000
> 
> 	eth3      Link encap:Ethernet  HWaddr 00:15:17:3E:2A:D6
> 	          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500
> Metric:1
> 	          RX packets:4776 errors:0 dropped:0 overruns:0 frame:0
> 	          TX packets:4577 errors:0 dropped:0 overruns:0
carrier:0
> 	          collisions:0 txqueuelen:1000
> 	          RX bytes:495819 (484.1 KiB)  TX bytes:467542 (456.5
> KiB)
> 	          Base address:0xdcc0 Memory:de780000-de7a0000
> 
> The Cisco 3570 configuration:
> Configured for LACP-only mode (unconditional LACP/802.1ad only).
> 
> 	interface gig1/0/M
> 	   no cdp enable
> 	   switchport
> 	   channel-group Y mode active
> 
> 	interface gig1/0/N
> 	   no cdp enable
> 	   switchport
> 	   channel-group Y mode active
> 
> 	interface port-channelY
> 	   switchport access vlan V
> 	   switchport mode access
> 
> 	V = vlan number
> 	M = first port number
> 	N = second port number
> 	Y = channel designation number
> 
> Thanks for your assistance.
> 
> 
> 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