Cisco Catalyst 4500 Series - About Supervisor Engine Redundancy Synchronization

11-4
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 11 Configuring Supervisor Engine Redundancy Using RPR and SSO on Supervisor Engine 6-E and Supervisor
About Supervisor Engine Redundancy Synchronization
• PVST+
• Rapid-PVST
• PortFast/UplinkFast/BackboneFast
• BPDU guard and filtering
• Voice VLAN
• Port security
• Unicast MAC filtering
• ACL (VACLS, PACLS, RACLS)
• QoS (DBL)
• Multicast storm control/broadcast storm control
SSO is compatible with the following list of features. However, the protocol database for these features
is not synchronized between the redundant and active supervisor engines:
• 802.1Q tunneling with Layer 2 Protocol Tunneling (L2PT)
• Baby giants
• Jumbo frame support
• CDP
• Flood blocking
• UDLD
• SPAN/RSPAN
• NetFlow
The following features are learned on the redundant supervisor engine if the SSO feature is enabled:
• All Layer 3 protocols on Catalyst 4500 series switches (Switch Virtual Interfaces)
About Supervisor Engine Redundancy Synchronization
During normal operation, the persistent configuration (RPR and SSO) and the running configuration
(SSO only) are synchronized by default between the two supervisor engines. In a switchover, the new
active supervisor engine uses the current configuration.
Note You cannot enter CLI commands on the redundant supervisor engine console.
These sections describe supervisor engine redundancy synchronization:
• RPR Supervisor Engine Configuration Synchronization, page 11-4
• SSO Supervisor Engine Configuration Synchronization, page 11-5
RPR Supervisor Engine Configuration Synchronization
Because the redundant supervisor engine is only partially initialized in RPR mode, it interacts with the
active supervisor engine only to receive configuration changes at startup and upon saving the
configuration changes.