>Two test systems were connected to a Cisco 6500 vlan using ports
>2/1 and 2/2 for one system, ports 2/3 & 2/4 for another systems.
>And we enabled port channeling on the cicso switch:
>b42-cisco1-246> (enable) set port channel 2/1-4 desirable
>Port(s) 2/1-4 are assigned to admin group 49.
>Port(s) 2/1-4 channel mode set to desirable.
On my Cisco 3550, "desirable" channel mode enables Cisco's
proprietary PAgP protocol, not LACP (802.3ad) protocol. You probably
want either "active" (for unconditional 802.3ad) or "passive" (do
802.3ad only if the peer initiates). I'd try "active" first, which
should get things working if both are running 802.3ad.
Also, it's not clear to me (I'm looking at the "2/1-4 are
assigned to admin group 49" line), but it looks like you've bundled
all four interfaces into one channel group; if you're using two
systems, you more likely want two channel groups of two interfaces
each. I'm not sure about this, but it seems that way based on the
configuration information you've supplied. The command syntax on the
3550 appears to be different from what you describe, so I'm not sure
how the 6500 handles this.
>My sysadmin was not sure about correct 802.3ad settings on
>the cisco 6500.
Be aware that 802.3ad is a relatively new feature on the Cisco
switch; I can't speak for the 6500 series, but on the 3550 I have
802.3ad has been available for less than a year. If your switch
rejects "active" and "passive" mode for the channel group, you may
need to upgrade the switch software.
>Besides the switch config, was the config at target system
>set OK? Did i need to set anything else other than mode=4?
I'd run the miimon at around 50 or 100, and use "mode=802.3ad"
(I can never remember the numbers), but what you have will work.
-Jay Vosburgh, IBM Linux Technology Center, fubar@...