Juniper EX9200 Features Manual page 65

Copyright © 2017, Juniper Networks, Inc.
Table 7: Effect of Split Detection on Common Virtual Chassis Failure
Scenarios (continued)
Type of Failure
Virtual Chassis port
interfaces go down
Chapter 8: Minimizing Network Disruption Using Split Detection
Split Detection
Setting Results
Disabled When Virtual Chassis port interfaces are
disconnected:
VC-M retains VC-M role, and VC-B also
takes VC-M role. The result is a Virtual
Chassis with two VC-M routers or
switches, each of which maintains
subscriber state information.
Initially, both VC-M routers or switches
have a complete list of subscribers.
Because the two routers or switches
have the same configuration, the effect
on subscribers, traffic patterns, behavior
of external applications, and subscriber
login and logout operations is
unpredictable while the Virtual Chassis
port interfaces are disconnected.
When Virtual Chassis port interfaces are
reconnected:
Original VC-M before the disconnection
resumes VC-M role, and original VC-B
before the disconnection resumes VC-B
role.
Subscribers on the VC-M are preserved.
Subscribers on the VC-B are purged.
The subscribers preserved on the VC-M
are unaffected, and all remaining
subscribers are able to log back in to
the router or switch.
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