Vss configuration guidelines and restrictions, General vss restrictions and guidelines, Vsl restrictions and guidelines – Cisco 6500 User Manual
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Cisco IOS Software Configuration Guide, Release 12.2SX
OL-13013-06
Chapter 4 Configuring Virtual Switching Systems
VSS Configuration Guidelines and Restrictions
VSL Down
If the VSL is down when both chassis try to boot up, the situation is similar to a dual-active scenario.
One of the chassis becomes VSS active and the other chassis initiates recovery from the dual-active
scenario. For further information, see the
“Configuring Dual-Active Detection” section on page 4-45
VSS Configuration Guidelines and Restrictions
The following sections describe restrictions and guidelines for VSS configuration:
•
General VSS Restrictions and Guidelines, page 4-27
•
VSL Restrictions and Guidelines, page 4-27
•
Multichassis EtherChannel Restrictions and Guidelines, page 4-28
•
Dual-Active Detection Restrictions and Guidelines, page 4-28
•
Service Module Restrictions and Guidelines, page 4-29
•
General VSS Restrictions and Guidelines
When configuring the VSS, note the following guidelines and restrictions:
•
The VSS configurations in the startup-config file must match on both chassis.
•
If you configure a new value for switch priority, the change takes effect only after you save the
configuration file and perform a restart.
•
Enable the out-of-band MAC address table synchronization among DFC-equipped switching
modules by entering the mac-address-table synchronize command.
VSL Restrictions and Guidelines
When configuring the VSL, note the following guidelines and restrictions:
•
For line redundancy, we recommend configuring at least two ports per switch for the VSL. For
module redundancy, the two ports can be on different switching modules in each chassis.
•
The no mls qos channel-consistency command is automatically applied when you configure the
VSL. Do not remove this command.
•
VSL ports cannot be Mini Protocol Analyzer sources (the monitor ... capture command). Monitor
capture sessions cannot be started if a source is the VSL on the port channel of the standby switch.
The following message is displayed when a remote VSL port channel on the standby switch is
specified and you attempt to start the monitor capture:
% remote VSL port is not allowed as capture source
The following message is displayed when a scheduled monitor capture start fails because a source
is a remote VSL port channel:
Packet capture session 1 failed to start. A source port is a remote VSL.