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09-12-2013 08:17 AM
09-12-2013 08:17 AM
HP A5500 monitor and mirroring port (inbound interface=0)
Hi,
Here's the configuration of the port 1/0/46 which is the monitor port of 1/0/3 on a HP A5500:
interface GigabitEthernet1/0/46
port link-mode bridge
description Websense N - MONITORING
port link-type hybrid
undo port hybrid vlan 1
port hybrid vlan 4 untagged
port hybrid pvid vlan 4
stp disable
mirroring-group 1 monitor-port
interface GigabitEthernet1/0/3
port link-mode bridge
description To Internet thru Checkpoint
port link-type hybrid
undo port hybrid vlan 1
port hybrid vlan 4 untagged
port hybrid pvid vlan 4
mirroring-group 1 mirroring-port both
There must be something wrong because I don't get any data in inbound but I get some on the outbound:
[mySwitch] dis counters inbound interface
Interface Total(pkts) Broadcast(pkts) Multicast(pkts) Err(pkts)
GE1/0/3 328841695 2253 0 0
GE1/0/46 0 0 0 0
[mySwitch] dis counters outbound interface
Interface Total(pkts) Broadcast(pkts) Multicast(pkts) Err(pkts)
GE1/0/3 639849600 154665 807380 0
GE1/0/46 969190475 313850 795382 0
Any idea why the monitor port does not get the same data as the mirroring port?
Thanks for your feedback
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09-15-2013 08:08 AM - edited 09-15-2013 08:09 AM
09-15-2013 08:08 AM - edited 09-15-2013 08:09 AM
Re: HP A5500 monitor and mirroring port (inbound interface=0)
Hi,
If I see it correctly the sum of the inbound and outbound packets on GE1/0/3 is apprx the same as the outbound packets on the GE1/0/43.
The way I understand port mirroring this should be the intended behaviour since you have configured "mirroring-port both"
Configuring mirroring you want the switch to copy the inbound and outbound packets passing through port 3 and send them to port 43. You would typicaly attach a PC with network analyser on port 43 and capture the packes or an IDS/IPS. So the only way for the switch to send the packets to the packet analyser is the send them through port 43 in outbound direction towards to the PC attached to port 43.
This is the way I see it!