Mirror Source And Destinations - Nokia 7302 Manual

Mirror Services
Nokia's implementation of packet mirroring is based on two assumptions:
•
•
8.2.1
Mirror sources and destinations have the following characteristics:
•
•
8.2.2
Configuring mirroring is similar to creating a uni-direction service. Mirroring requires
the configuration of:
•
•
Figure
•
•
612
Packets in ingress direction are mirrored as they appear on the wire. This is
important for troubleshooting encapsulation and protocol issues. When mirroring
at ingress, the HW sends an exact copy of the original ingress packet to the mirror
destination while normal forwarding proceeds on the original packet.
Packets in egress direction are not always sent as seen on the wire. Egress
mirroring is already performed in the ingress port. Packets will be send out on the
mirror to port always VLAN tagged and this VLAN is taken from the ingress port.
Packets arriving untagged at the ingress port will be tagged using the ingress port
PVID. This means that if VLAN translation is done for the packet while traveling
from ingress to egress port that this will not be visible in the mirrored packet. If the
mirror SAP has a VLAN tag different from 0 then the mirrored packet will be dual
tagged.

Mirror Source and Destinations

A mirror source can be defined on each port.
A single mirror destination can be defined. Mirrored packets that are sent out can
be encapsulated with a configurable VLAN.
Mirroring Configuration
Mirror source — The traffic on a specific point(s) to mirror.
Mirror destination — The location to send the mirrored traffic, where the sniffer will
be located.
35 shows a local mirror service configured on ALA-A.
Port 2/1/2 is specified as the source. Mirrored traffic ingressing and egressing this
port will be sent to port 2/1/3.
SAP 2/1/3 is specified as the destination. The sniffer is physically connected to
this port. Mirrored traffic ingressing and egressing port 2/1/2 is sent here.
3HH-11985-AAAA-TQZZA
FD 100/320Gbps NT and FX NT IHub Services Guide
Issue: 13