Back on the topic of storm-control, I recently deployed some new 3560G
switches and configured them with storm-control. There are some
interesting differences in storm-control on the 3560G and 6500.
The 3560G allowd me to configure storm-control using either bps or pps
rates. I chose to use pps. My only complaint so far is that on the 6500
I could "show int count storm" to see both the per-port config, and more
importantly, the per-port TotalSuppDiscards, which lets me see which ports
have been having traffic storm issues.
On the 3560G "show int count storm" isn't valid. I can "show storm" to
see the per-port config, interface filter state, and current
broadcast/multicast traffic level, but there's no history, so I won't know
if an interface dropped some packets due to storm-control.
Searching the documentation, I found
show interfaces [interface-id] counters multicast: Displays the
storm-control multicast suppression discard counter with the number of
packets discarded for all interfaces or the specified interface.
CLI online help / command completion doesn't seem to know about this, but
it does work (I think):
#sh int count ?
errors Show interface error counters
etherchannel Show interface etherchannel counters
module Limit display to interfaces on module
protocol interface protocol counters
trunk Show interface trunk counters
| Output modifiers
<cr>
#sh int count multi
Port McastSuppDiscards
Gi0/1 0
Gi0/2 0
Gi0/3 0
...
cloud-uplink-sw-1#sh int count broad
Port BcastSuppDiscards
Gi0/1 0
Gi0/2 0
Gi0/3 0
...
The switch is running the latest code (12.2(55)SE). All the counters are
0...which makes me wonder if they "work" because the servers on this
switch were generating occasional broadcast/multicast storms before the
3560G's were put in place.
----------------------------------------------------------------------
Jon Lewis, MCP :) | I route
Senior Network Engineer | therefore you are
Atlantic Net |
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
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