Erspan Guidelines And Restrictions - Cisco 7604 Configuration Manual

Local SPAN, RSPAN, and ERSPAN Configuration Guidelines and Restrictions
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ERSPAN Guidelines and Restrictions

These are ERSPAN guidelines and restrictions:
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Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
52-12
You must configure the RSPAN VLANs in all source, intermediate, and destination network devices.
If enabled, the VLAN Trunking Protocol (VTP) can propagate configuration of VLANs numbered
1 through 1024 as RSPAN VLANs. You must manually configure VLANs numbered higher than
1024 as RSPAN VLANs on all source, intermediate, and destination network devices.
If you enable VTP and VTP pruning, RSPAN traffic is pruned in the trunks to prevent the unwanted
flooding of RSPAN traffic across the network.
RSPAN VLANs can be used only for RSPAN traffic.
Do not configure a VLAN used to carry management traffic as an RSPAN VLAN.
Do not assign access ports to RSPAN VLANs. RSPAN puts access ports in an RSPAN VLAN into
the suspended state.
Do not configure any ports in an RSPAN VLAN except trunk ports selected to carry RSPAN traffic.
MAC address learning is disabled in the RSPAN VLAN.
You can use output access control lists (ACLs) on the RSPAN VLAN in the RSPAN source router
to filter the traffic sent to an RSPAN destination.
RSPAN does not support BPDU monitoring.
Do not configure RSPAN VLANs as sources in VSPAN sessions.
You can configure any VLAN as an RSPAN VLAN as long as all participating network devices
support configuration of RSPAN VLANs and you use the same RSPAN VLAN for each RSPAN
session in all participating network devices.
Release 12.2(18)SXE and later releases support ERSPAN.
Release 12.2(18)SXF and later releases support ERSPAN when the router is operating in any
switching mode. (CSCec70695)
Release 12.2(18)SXE and rebuilds support ERSPAN only when the router is operating in the
compact switching mode: all modules must be fabric-enabled.
The following supervisor engines support ERSPAN:
Supervisor engines manufactured with PFC3B and PFC3BXL support ERSPAN.
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A WS-SUP720 (a Supervisor Engine 720 manufactured with a PFC3A) can only support
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ERSPAN if it has hardware version 3.2 or higher. Enter the show module version | include
WS-SUP720-BASE command to display the hardware version. For example:
Router# show module version | include WS-SUP720-BASE
7 2 WS-SUP720-BASE
– To confirm that your supervisor engine supports ERSPAN, enter the show asic-version slot
slot_number | include ASIC|HYPERION command for the supervisor engine. For example:
Router# show asic-version slot 1 | include ASIC|HYPERION
Module in slot 1 has 2 type(s) of ASICs
ASIC Name
HYPERION
Hyperion version 2.0 and higher supports ERSPAN.
Supervisor engine 2 does not support ERSPAN.
Chapter 52
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Count Version
1 (6.0)
Configuring Local SPAN, RSPAN, and ERSPAN
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