Policy application to inbound traffic on a VLAN interface
Policy configuration that defines the preconfigured class and session/destination device to which matching packets are mirrored
Class configuration that defines the matching TCP packets to be mirrored

Monitoring and Analyzing Switch Operation

Traffic Mirroring

2.On source switch A, configure an association between the remote mirror­ ing endpoint on switch C and a mirroring session on switch A (as described in “3. Configure a Mirroring Session on the Source Switch” on page B-52).

3.On switch A, configure a classifier-based mirroring policy to select inbound TCP traffic destined to the server at 10.10.30.153, and apply the policy to the interfaces of VLAN 10 (as described in “Selecting Inbound Traffic Using Advanced Classifier-Based Mirroring” on page B-66).

On a source switch, associates session number 1 with a source IP address and UDP port, and a remote destination IP address.

1Switch-A(config)# mirror 1 remote ip 10.10.10.119 9300 10.10.30.2 Caution: Please configure destination switch first.

Do you want to continue [y/n]? y

2 Switch-A(config)# class ipv4 tcp7 Switch-A(class-config)# match tcp any 10.10.30.153

Switch-A(class-config)# match tcp any host 10.10.20.153/24 Switch-A(class-config)# match tcp any any eq 80 Switch-A(class-config)# exit

Switch-A(config)# policy mirror mirrorTCP Switch-A(policy-config)# class ipv4 tcp7 action mirror 1 Switch-A(policy-config)# exit

3Switch-A(config)# vlan 10 service-policy mirrorTCP in

The source IP address and UDP port number identify the mirroring source in session 1;

1 the destination IP address identifies the remote switch to which traffic is mirrored. (The exit port for mirrored traffic, configured in Figure B-51, and the remote switch can belong to different VLANs.)

2

Configures a class that selects IPv4 TCP traffic destined to: the server at 10.10.30.153, a

 

device in subnet 10.10.20.0, and any TCP traffic on port 80. (A packet that does not match

 

these criteria is transmitted without being mirrored.)

3

 

 

 

Configures VLAN 10 as the source interface, and the mirroring policy as the selection

 

 

criteria for inbound traffic on VLAN 10 in session 1.

 

 

 

 

Figure B-52. Configuring a Classifier-Based Policy on Source Switch A4.On source switch B, repeat Steps 2 and 3:

a.Configure an association between the remote mirroring endpoint on switch C and a mirroring session on switch B.

B-89