Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SERVICE AVAILABILITY CONFIGURATION GUIDE 2010-10-08 Configuration Manual page 13

Chapter 6
Chapter 7
Copyright © 2010, Juniper Networks, Inc.
IS-IS Effects on Graceful Restart and Network Stability During Unified ISSU . . . 129
Configuring Graceful Restart Before Unified ISSU Begins . . . . . . . . . . . . . . . 129
Configuring Graceful Restart When BGP and LDP Are Configured . . . . . . . . 130
Routing Around the Restarting Router to Minimize Network Instability . . . . 130
Unexpected L2TP Failover of Established Tunnels During Unified ISSU . . . . . . . . 131
OSPF Effects on Graceful Restart and Network Stability During Unified ISSU . . 132
Configuring Graceful Restart Before Unified ISSU Begins . . . . . . . . . . . . . . . 132
Configuring Graceful Restart When BGP and LDP Are Configured . . . . . . . . 132
Configuring a Longer Dead Interval Than Normal . . . . . . . . . . . . . . . . . . . . . 132
Routing Around the Restarting Router to Minimize Network Instability . . . . 133
Unexpected Suspension of PIM During Unified ISSU . . . . . . . . . . . . . . . . . . . . . . 133
Unexpected Suspension of Subscriber Login and Logouts During Unified
ISSU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Subscriber Statistics Accumulation or Deletion . . . . . . . . . . . . . . . . . . . . . . . 134
Unexpected SONET and SDH Behavior During Unified ISSU . . . . . . . . . . . . . . . . 134
Unexpected T3 Behavior During Unified ISSU . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Unavailability of TACACS+ Services During Unified ISSU . . . . . . . . . . . . . . . . . . . 135
Interruption in Traffic Forwarding for Layer 3 Routing Protocols During Unified
ISSU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Recommended Settings for Routing Protocol Timers During Unified ISSU . . . . . 138
Upgrading Router Software with Unified ISSU . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Halt of Unified ISSU During Initialization Phase Overview . . . . . . . . . . . . . . . . . . 142
Halting Unified ISSU During Initialization Phase . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Halt of Unified ISSU During Upgrade Phase Overview . . . . . . . . . . . . . . . . . . . . . 143
Halting Unified ISSU During Upgrade Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Monitoring the Status of the Router During Unified ISSU . . . . . . . . . . . . . . . . . . . 144
Configuring VRRP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
VRRP Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
VRRP Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
VRRP Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
VRRP References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
VRRP Implementation in E Series Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
VRRP Router Election Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Example: Basic VRRP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Example: Commonly Used VRRP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Example: VRRP Configuration Without the Real Address Owner . . . . . . . . . . . . . 155
Before You Configure VRRP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Configuring VRRP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Changing the Object Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Monitoring the Configuration of VRIDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Monitoring the Configuration of VRRP Neighbors . . . . . . . . . . . . . . . . . . . . . . . . . 162
Monitoring the Statistics of VRRP Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Monitoring the Configuration of VRRP Tracked Objects . . . . . . . . . . . . . . . . . . . . 166
Managing Interchassis Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
ICR Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
ICR Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Interface Specifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
ICR Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
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