Effect Of Split Detection On Virtual Chassis Failure Scenarios; Table 7: Effect Of Split Detection On Common Virtual Chassis Failure - Juniper EX9200 Features Manual

Virtual Chassis Feature Guide for EX9200 Switches

Effect of Split Detection on Virtual Chassis Failure Scenarios

64
switch is more likely to fail than the Virtual Chassis port interfaces to the
backup router or switch. Configuring redundant Virtual Chassis ports on
different line cards in each member router or switch reduces the likelihood
that all Virtual Chassis port interfaces to the backup router or switch can fail.
The behavior of a Virtual Chassis during certain failure scenarios depends on whether
split detection is enabled or disabled.
detection setting on common failure scenarios in a two-member MX Series Virtual Chassis.

Table 7: Effect of Split Detection on Common Virtual Chassis Failure

Scenarios
Type of Failure
Virtual Chassis port
interfaces go down
Table 7 on page 64
Split Detection
Setting Results
Enabled VC-B takes VC-M role.
Previous VC-M takes
role. The
router or switch and removes it from
the Virtual Chassis until connectivity is
restored.
Result is a single-member Virtual
Chassis consisting of only a single
VC-M. The VC-M continues to maintain
subscriber state information and route
traffic.
When Virtual Chassis port interfaces are
reconnected:
VC-M retains VC-M role.
VC-L takes VC-B role.
Subscribers are not affected.
describes the effect of the split
line-card (VC-L)
role isolates the
line-card
Copyright © 2017, Juniper Networks, Inc.