Mirror Examples; Device Mirror Troubleshooting - Planet XGS3-42000R User Manual

55.7 Mirror Examples

Example:
The requirement of the configurations is shown as below: to monitor at interface 1 the data frames sent out by
interface 9 and received from interfac e 7, sent and received by CPU, and the data frames received by
interface 15 and matched by rule 120(The sourc e IP address is 1.2.3.4 and the destination IP address is
5.6.7.8).
Configuration guidelines:
1. Configure interfac e 1 to be a mirror destination interface.
2. Configure the interface 7 ingress and interface 9 egress to be mirrored source.
3. Configure the CP U as one of the source.
4. Configure access list 120.
5. Configure access 120 to binding interface 15 ingress.
Configuration procedure is a s follows:
XGS 3-42000R(config)#monitor session 4 destination interface et hernet 1/1
XGS 3-42000R(config)#monitor session 4 source interface ethernet 1/7 rx
XGS 3-42000R(config)#monitor session 4 source interface ethernet 1/9 tx
XGS 3-42000R(config)#monitor session 4 source cpu
XGS 3-42000R(config)#access-list 120 permit tcp 1.2.3.4 0.0.0.255 5.6.7.8 0.0.0.255
XGS 3-42000R(config)#monitor session 4 source interface ethernet 1/15 access-list 120 rx

55.8 Device Mirror Troubleshooting

If problems occur on configuring port mirroring, pleas e check the following first for causes:

Whether the mirror destination port is a member of a TRUNK group or not, if yes, modify the TRUNK
group.

If the throughput of mirror destination port is smaller than the total throughput of mirror source port(s),
the destination port will not be able to duplicate all source port traffic; please dec reas e the number of
source ports, duplicate traffic for one direction only or choose a port with greater throughput as the
destination port. Mirror destination port can not be pulled into Isolate vlan, or will affect mirror bet ween
VLAN.
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