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BRKARC-3445
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System High Availability
Stateful Switchover (SSO)
Utilizes IOS high availability
framework
Synchronizes HW states in real-
time between supervisors
SW processes may be clients of
HA Framework
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Standby Supervisor
Active Supervisor
Real-Time
SSO Sync
SSO Synchronizes:
Port Security 802.1x
IGMP Snooping ARP/DHCP
VLANs/Trunks/Ports STP/VTP/DTP
PAgP/LACP 802.1Q
ACL/QoS Voice VLAN with PoE
SSO—Supervisor Redundancy
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