Reference Guide

1 Enable ow-based monitoring for a monitoring session in MONITOR-SESSION mode.
flow-based enable
2 Return to CONFIGURATION mode.
exit
3 Create an access list in CONFIGURATION mode.
ip access-list access-list-name
4 Dene access-list rules using seq, permit, and deny statements in CONFIG-ACL mode. The ACL rules describe the trac you
want to monitor. Flow monitoring is supported for IPv4 ACLs, IPv6 ACLs, and MAC ACLs.
seq sequence-number {deny | permit} {source [mask] | any | host ip-address} [count [byte]]
[fragments] [threshold-in-msgs
count] [capture session session-id]
5 Return to CONFIGURATION mode.
exit
6 Apply the ow-based monitoring ACL to the monitored source port in CONFIGURATION mode (up to 140 characters).
ip access-group access-list-name {in | out}
Enable ow-based monitoring
OS10(config)# monitor session 1
OS10(conf-mon-local-1)# flow-based enable
OS10(conf-mon-local-1)# exit
OS10(config)# ip access-list ipacl1
OS10(conf-ipv4-acl)# deny ip host 1.1.1.23 any capture session 1 count
OS10(conf-ipv4-acl)# exit
OS10(config)# mac access-list mac1
OS10(conf-mac-acl)# deny any any capture session 1
OS10(conf-mac-acl)# exit
OS10(config)# interface ethernet 1/1/9
OS10(conf-if-eth1/1/9)# mac access-group mac1 in
OS10(conf-if-eth1/1/9)# end
OS10# show mac access-lists in
Ingress MAC access-list mac1
Active on interfaces :
ethernet1/1/9
seq 10 deny any any capture session 1 count (0 packets)
Remote port monitoring on VLT
In a network, devices congured with peer VLT nodes are considered as a single device. You can apply remote port monitoring (RPM) on
the VLT devices in a network.
When VLT devices are used as a source or intermediate device, the RPM session provides redundancy to the snier-connected devices.
In a non-failover case, the monitored trac is regular.
In a failover case, the monitored trac reaches the packet analyzer connected to TOR through the VLT interconnect link.
NOTE
:
• In VLT devices congured with RPM, when the VLT link is down, the monitored packets might drop for some time. The time is
equivalent to the VLT failover recovery time (delay restore).
• You cannot apply ERPM on VLT devices.
Port monitoring commands
Layer 2
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