•  JunosE 11.2.x Service Availability Configuration Guide
  •  Copyright and Trademark Information
  •  Table of Contents
  •  List of Figures
  •  List of Tables
  •   About the Documentation
    •  E Series and JunosE Documentation and Release Notes
    •  Audience
    •  E Series and JunosE Text and Syntax Conventions
    •  Obtaining Documentation
    •  Documentation Feedback
    •  Requesting Technical Support
  •   Chapters
    •   Service Availability
      •   Service Availability Overview
        •  Service Availability Versus High Availability
      •   Understanding Service Availability Features
        •  Module Redundancy
        •  Stateful SRP Switchover
        •  Unified ISSU
        •  VRRP
        •  Interchassis Redundancy
    •   Managing Module Redundancy
      •   Line Module Redundancy Overview
        •   Module Requirements
          •  ERX7xx Models and ERX14xx Models
          •   E120 and E320 Routers
            •  IOA Behavior When the Router Reboots
            •  Line Module Behavior When Disabling or Enabling IOAs
        •   Automatic Switchover
          •  Limitations of Automatic Switchover
        •  Reversion After Switchover
        •  Configuring Line Module Redundancy
        •  Managing Line Module Redundancy
        •  SRP Module Redundancy
        •  SRP Module Behavior
        •  Specifying the Configuration for Redundant SRP Modules
        •  Installing a Redundant SRP Module
        •  Managing SRP Module Redundancy
        •  Switching to the Redundant SRP Module
        •  Upgrading Software on a Redundant SRP Module
        •  Monitoring the Status LEDs
      •  Monitoring Line Module and SRP Module Redundancy
      •  Managing Port Redundancy
    •   Managing Stateful SRP Switchover
      •  Stateful SRP Switchover Overview
      •   Stateful SRP Switchover Platform Considerations
        •  Module Requirements
      •   Stateful SRP Switchover Redundancy Modes
        •  File System Synchronization Mode
        •  High Availability Mode
      •   Stateful SRP Switchover States
        •  Disabled State
        •  Initializing State
        •  Active State
        •  Pending State
      •   Application Support for Stateful SRP Switchover
        •  Application Support
      •  Guidelines for Activating High Availability
      •  Activating High Availability
      •  Guidelines for Deactivating High Availability
      •  Deactivating High Availability
      •  Guidelines for Setting the IP Interface Priority
      •  Setting the IP Interface Priority
      •  Guidelines for Upgrading Software
      •  Monitoring the Redundancy Status
      •  Monitoring the Redundancy Status of Applications
      •  Monitoring the Redundancy History
      •  Monitoring the Redundancy Status of Line Modules
      •  Monitoring the Redundancy Status of SRP Modules
      •  Monitoring the Redundancy Switchover History
      •  Clearing the Redundancy History
    •   Configuring a Unified In-Service Software Upgrade
      •   Unified ISSU Overview
        •  Router Behavior During a Unified In-Service Software Upgrade
      •  Unified ISSU Platform Considerations
      •   Hardware and Software Requirements Before Beginning a Unified ISSU
        •  Hardware Requirements for Unified ISSU
        •  Software Requirements for Unified ISSU
      •  Unified ISSU Terms
      •  Unified ISSU References
      •  Unified ISSU Phases Overview
      •   Unified ISSU Initialization Phase Overview
        •  Application Data Upgrade on the Standby SRP Module
        •  SNMP Traps
      •   Unified ISSU Upgrade Phase Overview
        •  Exceptions During the Upgrade Phase
        •  Verifications of Requirements
        •   Upgrade Setup
          •  Line Module Arming
          •  Line Module Control Plane Upgrade
          •  SRP Module Switchover
          •  Line Module Forwarding Plane Upgrade
      •  Unified ISSU Service Restoration Phase Overview
      •  Application Support for Unified ISSU
      •  Unexpected AAA Authentication and Authorization Behavior During Unified ISSU
      •   Unexpected ATM Behavior During Unified ISSU
        •  ILMI Sessions Not Maintained
        •  OAM CC Effects on VCC
        •  OAM VC Integrity Verification Cessation
        •  Port Data Rate Monitoring Cessation
        •  VC and VP Statistics Monitoring Halts Unified ISSU Progress
      •   Unexpected DHCP Behavior During Unified ISSU
        •  DHCP Packet Capture Halted on Line Modules
      •  Unexpected Denial-of-Service Protection Behavior During Unified ISSU
      •   Unexpected Ethernet Behavior During Unified ISSU
        •  ARP Packets Briefly Not Sent or Received
        •  Link Aggregation Interruption
        •  Port Data Rate Monitoring Halted
        •  VLAN Statistics Monitoring Halts Unified ISSU Progress
      •  Unexpected File Transfer Protocol Server Behavior During Unified ISSU
      •   IS-IS Effects on Graceful Restart and Network Stability During Unified ISSU
        •  Configuring Graceful Restart Before Unified ISSU Begins
        •  Configuring Graceful Restart When BGP and LDP Are Configured
        •  Routing Around the Restarting Router to Minimize Network Instability
      •  Unexpected L2TP Failover of Established Tunnels During Unified ISSU
      •   OSPF Effects on Graceful Restart and Network Stability During Unified ISSU
        •  Configuring Graceful Restart Before Unified ISSU Begins
        •  Configuring Graceful Restart When BGP and LDP Are Configured
        •  Configuring a Longer Dead Interval Than Normal
        •  Routing Around the Restarting Router to Minimize Network Instability
      •  Unexpected Suspension of PIM During Unified ISSU
      •   Unexpected Suspension of Subscriber Login and Logouts During Unified ISSU
        •  Subscriber Statistics Accumulation or Deletion
      •  Unexpected SONET and SDH Behavior During Unified ISSU
      •  Unexpected T3 Behavior During Unified ISSU
      •  Unavailability of TACACS+ Services During Unified ISSU
      •  Interruption in Traffic Forwarding for Layer 3 Routing Protocols During Unified ISSU
      •  Recommended Settings for Routing Protocol Timers During Unified ISSU
      •  Upgrading Router Software with Unified ISSU
      •  Halt of Unified ISSU During Initialization Phase Overview
      •  Halting Unified ISSU During Initialization Phase
      •  Halt of Unified ISSU During Upgrade Phase Overview
      •  Halting Unified ISSU During Upgrade Phase
      •  Monitoring the Status of the Router During Unified ISSU
    •   Configuring VRRP
      •  VRRP Overview
      •  VRRP Platform Considerations
      •  VRRP Terms
      •  VRRP References
      •  VRRP Implementation in E Series Routers
      •  VRRP Router Election Rules
      •  Example: Basic VRRP Configuration
      •  Example: Commonly Used VRRP Configuration
      •  Example: VRRP Configuration Without the Real Address Owner
      •  Before You Configure VRRP
      •  Configuring VRRP
      •  Changing the Object Priority
      •  Monitoring the Configuration of VRIDs
      •  Monitoring the Configuration of VRRP Neighbors
      •  Monitoring the Statistics of VRRP Routers
      •  Monitoring the Configuration of VRRP Tracked Objects
    •   Managing Interchassis Redundancy
      •  ICR Overview
      •   ICR Platform Considerations
        •  Interface Specifiers
      •  ICR Terms
      •  ICR References
      •   ICR Scaling Considerations
        •  1:1 Subscriber Redundancy in a 4–Node ICR Cluster
      •   Interaction with RADIUS for ICR
        •  ICR Partition Accounting Overview
      •  Configuring an ICR Partition
      •  Configuring the Interface on Which the ICR Partition Resides
      •  Configuring VRRP Instances to Match ICR Requirements
      •  Naming ICR Partitions
      •  Grouping ICR Subscribers Based on S-VLAN IDs
      •  Grouping ICR Subscribers Based on VLAN IDs
      •  Example: Configuring ICR Partitions That Group Subscribers by S-VLAN ID
      •  Using RADIUS to Manage Subscribers Logging In to ICR Partitions
      •  Monitoring the Configuration of an ICR Partition Attached to an Interface
      •  Monitoring the Configuration of ICR Partitions
  •   Index
    •  Index

A

Access-Request messages    

ICR Partition ID VSA    1

Acct-Start messages    

ICR Partition ID VSA    1

Acct-Stop messages    

ICR Partition ID VSA    1

active    

high availability state    1

application support    

high availability    1

assembly numbers, displaying for hardware    1

assembly revisions, displaying for hardware    1

automatic switchover    1

B

backup router    1, 2

defined    1

election process and    1, 2

VRRP    1

bandwidth    

optimizing    1

C

clear redundancy commands    

clear redundancy history    1

conventions    

notice icons    1

text and syntax    1

customer support    1

contacting JTAC    1

D

destination address (DA), VRRP    1

disable-switch-on-error command    1

disabled    

high availability state    1

documentation set    

comments on    1

F

failover.     See switchover    

file system synchronization mode    

redundancy mode    1

H

hardware    

monitoring information    1, 2

high availability    

activating    1

activating guidelines    1

deactivating    1, 2

IP interface priority    1, 2

overview    1

high availability mode    

redundancy mode    1

I

icr cluster    1

ICR commands    

interface    1

icr interface    1

ICR Options    

icr-control-interface    1

priority command    1

timers-learn command    1

ICR Partition    

configuring    1, 2, 3, 4, 5

configuring, naming    1

radius    1

ICR partition accounting    

and dependence on Acct-Stop messages    1

configuring    1

disabling and enabling messages    

sent to the RADIUS server    1

overview    1

processing in different scenarios    

administrative switchover    1

complete chassis failure    1

line module or interface failure    1

transition of ICR partition states    1

ICR Partition commands    

naming    1

ICR partition ID VSA    

including in access and accounting messages    1

ICR Partition ID VSA    

transmitting to the virtual router    

where ICR control interface is configured    1

where ICR partition is configured    1

ICR Partition Options    

advertise-mac    1, 2

control-interface    1, 2

group option    1, 2

use-default-mac    1, 2

ICR Partitions    

configuration example    

backup ICR partition, S-VLAN based grouping    1

master ICR partition, S-VLAN based grouping    1

ICR RADIUS commands    

inclusion of icr-partition-id    1

radius icr-partition-accounting    1

icr-partition    1

in-service software upgrade.     See unified ISSU    

initializing    

high availability state    1

Interchassis Redundancy    

heterogenous icr clusters    1

icr clusters    1

icr partition    1

Interim-Acct messages    

ICR Partition ID VSA    1

IP addresses    

IP address owner, VRRP    1

primary, VRRP    1

VRRP    1, 2

ip commands    1,  See also vrrp commands    

ip address    1

ip vrrp    1

ip vrrp accept-data    1

ip vrrp advertise-interval    1

ip vrrp authentication-key    1

ip vrrp authentication-type    1

ip vrrp enable    1, 2

ip vrrp preempt    1

ip vrrp priority    1, 2

ip vrrp track    1

ip vrrp virtual-address    1, 2

ip pim commands    

ip pm dr-priority    1

ISSU.     See unified ISSU    

L

LEDs    

monitoring status    1

line module redundancy    

configuring    1, 2

E120 and E320 Broadband Services Routers    1

IOA behavior    1

ERX7xx models and ERX14xx models    1

managing    1

monitoring    1

M

manuals    

comments on    1

master router    1

memory (hardware), displaying    1

N

notice icons    1

O

optimizing bandwidth    1

P

pending    

high availability state    1

physical slots    

rebooting    1

platform considerations    

high availability    1

R

RADIUS    1

redundancy    

line module.     See line module redundancy    

SRP module.     See SRP module redundancy    

redundancy commands    

redundancy force-switchover    1, 2

redundancy lockout    1

redundancy revert    1

redundancy revertive    1

redundancy modes    

high availability    1

reversion    

after switchover    1

revisions, displaying assembly    1

S

serial numbers, displaying for hardware    1

Service Availability    

Features    1

ICR    1

Module redundancy    1

Stateful SRP Switchover    1

Unified ISSU    1

VRRP    1

show environment command    1

show hardware command    1

show icr commands    

show icr-partition    1

show icr-partitions    1

state    1

summary    1

show ip commands    

show ip vrrp    1, 2

show ip vrrp brief    1, 2

show ip vrrp neighbor    1

show ip vrrp neighbors    1

show ip vrrp statistics    1, 2, 3, 4

show ip vrrp statistics global    1, 2, 3

show ip vrrp summary    1, 2

show ip vrrp tracked-objects    1, 2

show issu commands    

show issu    1

show issu brief    1

show issu detail    1

show redundancy commands    

show redundancy    1, 2

show redundancy clients    1

show redundancy clients all    1

show redundancy detail    1

show redundancy history    1

show redundancy history detail    1

show redundancy line-card    1

show redundancy srp    1

show redundancy srp detail    1

show redundancy switchover-history    1

show version command    1

software    

upgrading    1

SRP module redundancy    1

managing    1

monitoring    1

SRP modules    

installing a redundant module    1

reset button    1

srp switch command    1

stateful SRP switchover.    1,  See also high availability    

states    

high availability    1

status LEDs, monitoring    1

support, technical     See technical support    

switchover    1

synchronize command    1, 2

T

technical support    

contacting JTAC    1

text and syntax conventions    1

U

unified ISSU (in-service software upgrade)    1

AAA support    1

application support    1

ATM support    1

ATM port date rate    1

ILMI sessions    1

OAM CC effects    1

OAM VC integrity    1

VC and VP statistics    1

DHCP support    1

common component    1

external server    1

packet capture    1

relay and relay proxy    1

DHCP support:relay and relay proxy    1

DoS protection support    1

Ethernet support    1

ARP entries    1

LAG    1

port data rate    1

VLAN statistics    1

FTP support    1

halting during initialization    1

halting during upgrade    1

initialization phase    1

application data on standby SRP module    1

line module arming    1

SNMP traps    1

IS-IS support    1

graceful restart    1

high link cost    1

L2TP support    1

layer 3 protocol traffic forwarding    1

OSPF support    1

dead interval    1

graceful restart    1

high link cost    1

overview    1

phases    

initialization    1

overview of    1

service restoration    1

upgrade    1

PIM support    1

platform    1

procedure for upgrade    1

references    1

requirements    

hardware    1, 2

software    1

traffic forwarding    1

verification in upgrade phase    1

restoring original router state    1, 2

router behavior    1

service restoration phase    1, 2

SONET/SDH support    1

subscriber support    1

logins    1

statistics    1

support, application    1

T3 support    1

TACACS+ support    1

terms    1

timer settings for routing protocol timers    1

upgrade phase    1, 2

exceptions    1

line module control plane    1

line module forwarding plane upgrade    1

process steps    1

setup    1

SRP module switchover    1

verification requirements    1

upgrade procedure    1

unified ISSU (in-service software upgrade):DHCP support    

local server    1

upgrading software    1

high availability    1

V

virtual MAC address    1

virtual router ID (VRID).     See VRID    

Virtual Router Redundancy Protocol (VRRP).     See VRRP    

VRID (virtual router ID)    

configuration    1

creating    1, 2

router election rules    1, 2

vrrp    

platform    1

VRRP    1

VRRP (Virtual Router Redundancy Protocol)    

advertisement interval    1

advertisement messages    1

authentication key    1

authentication type    1

backup router    1, 2, 3, 4, 5

configuration examples    1, 2, 3

configuring    1

how it works    1

implementation    1, 2

MAC address    1

master router    1

monitoring    1, 2, 3, 4

overview    1

preemption    1, 2

router election rules    1, 2

router priority    1

VLAN support    1

VRRP router defined    1

vrrp commands    

ip vrrp    1

ip vrrp accept-data    1

ip vrrp advertise-interval    1

ip vrrp authentication-key    1

ip vrrp authentication-type    1

ip vrrp enable    1, 2

ip vrrp preempt    1, 2

ip vrrp priority    1

ip vrrp track    1

ip vrrp virtual-address    1

VRRP commands    

icr    1

W

warm restart    

IP interface priority    1, 2