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Monitoring and Analyzing Switch Operation
Traffic Mirroring
Example: Remote Mirroring Using a Classifier-Based Policy
In the network shown in Figure B-50, an administrator has connected a traffic
analyzer to port A15 (in VLAN 30) on switch C to monitor the TCP traffic to
the server at 10.10.30.153 from workstations connected to switches A and B.
Remote mirroring sessions are configured on switches A and B, and a remote
mirroring endpoint on switch C. TCP traffic is routed through the network to
the server from VLANs 10 and 20 on VLAN 30.
Network
10.10.30.153
Switch A
Switch C
Traffic
Analyzer
A15
VLAN 30
10.10.30.2
VLAN 10
10.10.10.119
Switch B
VLAN 20
10.10.20.145
Server
Figure B-50. Sample Topology in a Remote Mirroring Session
To configure this remote mirroring session using a classifier-based policy to
select inbound TCP traffic on two VLAN interfaces, take the following steps:
1. On remote switch C, configure a remote mirroring endpoint using port
A15 as the exit port (as described in “2. Configure a Mirroring Destination
on a Remote Switch” on page B-50).
On the remote (endpoint) switch,
configures the IP address and UDP
port of each source switch.
On the remote (endpoint) switch, configures the
destination IP address and remote exit port.
Switch-C(config)# mirror endpoint 10.10.10.119 9300 10.10.30.2 port a15
Switch-C(config)# mirror endpoint 10.10.20.145 9300 10.10.30.2 port a15
Figure B-51. Configuring a Remote Mirroring Endpoint: Remote Switch and Exit Port
B-88