Does Cisco load balance with multiple dest ports in a SPAN?

[Mike Pilkington]

Someone I trust said that when configuring multiple destination ports
in a Cisco SPAN session, the mirrored traffic will be load-balanced
across the destination ports. Although I trust this guy in most
cases, I find that hard to believe. I haven't had time to test, so I
thought I'd ask you folks. Is this so?

I did bit of googling, but nothing conclusive...


Destination port characteristics:
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_55_se/configuration/guide/swspan.html#wp1036749


This one definitely suggest load balancing in the blog discussion, but
I still don’t see where Cisco says it is balanced/divided/spread
between the destination ports:
http://blog.securactive.net/?p=2231


Thanks,
Mike

[Mike Pilkington]

Thanks for the reply. I talked to him again and we've opened up a
Cisco ticket. We're still waiting for proper documentation, and will
likely do some testing to verify, but it appears that a standard SPAN
(with the 'monitor' command) to multiple destination ports will send
full copies to all ports--as I would want and expect.

As I get more information, I'll pass it along.

Thanks,
Mike

On 9/19/12, jswan <sanju...@gmail.com> wrote:
> I replied to this a couple of days ago, but Google seems to have eaten my
> post. The short version is that there's a feature available on the Catalyst
> 6500/7600 platform called RSPAN with VACL Redirection that does what you're
> describing. That's probably what your friend was thinking of.
>
> I don't think it's available in other Cisco switch platforms.
>
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>
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>