Manual

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Москва, Новозаводская ул., 18, стр. 1
330
configuration, and reduced system resources.
To be noticed: Normal mode is introduced by default. When using the normal mode,
datagrams with reserved MAC addresses cannot be broadcasted.
The number of the source mirror ports is not limited, and can be one or more. Multiple source
ports are not restricted to be in the same VLAN. The destination port and the source ports can
be in different VLAN.
For configuration of RSPAN, a dedicated RSPAN VLAN should be configured first for carrying
the RSPAN datagrams. The default VLAN, dynamic VLAN, private VLAN, multicast VLAN, and
the layer 3 interface enabled VLAN cannot be configured as the RSPAN VLAN. The reflector
port must belong to the RSPAN VLAN. The destination port should be connected to the
Monitor and the configured as access port or the TRUNK port. The RSPAN reflector port will
be working dedicatedly for mirroring, when a port is configured as a reflector port, it will
discards all the existing connections to the remote peer, disable configurations related to
loopback interfaces, and stop forwarding datagram. Connectivity between the source and
destination switch for Remote VLAN, should be made sure by configuration.
To be noticed:
1. Layer 3 interfaces related to RSPAN VLAN should not be configured on the source,
intermediate, and the destination switches, or the mirrored datagrams may be discarded.
2. For the source and intermediate switches in the RSPAN connections, the native VLAN of
TRUNK port cannot be configured as the RSPAN VLAN, Otherwise the RSPAN tag will be
disposed before reaching the destination switches.
3. The source port, in access or trunk mode, should not be added to RSPAN VLAN if advanced
RSPAN mode is chosen. When the reflector port is used for a inter-card mirroring of CPU TX
data, it must be configured as TRUNK port and allows the RSPAN VLAN data passing, the
Native VLAN should not be configured as RSPAN VLAN.
4. When configuring the remote mirroring function, the network bandwidth should be
considered in order to carry the network flow and the mirrored flow.
Keywards:
RSPAN: Remote Switched Port Analyzer
RSPAN VLAN: Dedicated VLAN for RSPAN
RSPAN Tag: The VLAN tag which is attached to MTP of the RSPAN datagrams.
Reflector Port: The local mirroring port between the RSPAN source and destination ports,
which is not directly connected to the intermediate switches.
37.2 RSPAN Configuration Task List
Configure RSPAN VLAN
Configure mirror source port
Configure mirror destination port