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JunosE 12.1.x Service Availability Configuration Guide

access modules
ES2 4G LMs as
in an LNS device, stateful switchover
access modules in the LNS
receipt of event from an application
access module processes PPP echo requests
failure with the primary module
Access-Request messages
ICR Partition ID VSA
Acct-Start messages
ICR Partition ID VSA
Acct-Stop messages
ICR Partition ID VSA
activating guidelines
high availability, line modules
mirroring configuration files from active to standby
reverting to default redundancy mode
same software release on primary and secondary modules
active
high availability state
active, line module high availability state
change in previously matching criterion
transition to disabled state
mirroring of information
relevant applications create and post transactions
standby module replays updates and performs changes for applications
updates in settings sent to standby module
synchronization of data
from active to standby module
unsupported application configured
transition to disabled state
when a switchover occurs
warm restart of standby module
application support
high availability
Automatic Reversion
enabling
automatic switchover
limitations
Automatic Switchover
disabling

backup router
defined
election process and 1, 2
VRRP

call setup rate
data synchronization
impact on
under peak load conditions
time for system to become HA-active
clear redundancy commands
clear redundancy history
cold boot
of secondary line module
when slot is disabled
when slot is reloaded
when software fault occurs
commands for configuring
stateful SRP switchover
similarity with commands for stateful line module switchover
connection manager
usage of stream ID
to identify connections
conventions
notice icons
text and syntax
customer support
contacting JTAC

data synchronization
call setup rate impact
consumption of backplane bandwidth
deactivating
high availability, line modules
deactivating guidelines
high availability, line modules
redundancy mode of line modules
disruption in user sessions, forwarding data
reloading interfaces, routing tables from SRP
destination address (DA), VRRP
direct memory access (DMA)
receipt of packets for forwarding controller
by interface controller
receipt of packets for system controller
by interface controller
disable-switch-on-error command
disabled
high availability state
disabled, line module high availability state
cold-restart of the router
when switchover occurs
retention in the same state
requirements not met
disabled,, line module high availability state
criteria to move to initializing state
active module support for high availability
high availability mode configured
releases on standy and active modules are same
standby module is online, mirroring enabled
standby module support for high availability
router uses redundancy mode
documentation set
comments on
double fault window
scenarios that occur
stateful line module switchover after stateful SRP switchover is completed
stateful SRP switchover after line module high availability is completed
stateful SRP switchover before enabling line module high availability
simultaneous switchovers of
line module and SRP module
system behavior during
downlink modules
ES2 4G LMs as
in an LNS device, stateful switchover
drop events
on egress queues
not preserving across stateful switchover of LMs
drop rates
on egress queues
not preserving across stateful switchover of LMs

egress queues
drop events on
stateful switchover of LMs
drop rates on
stateful switchover of LMs
forwarding events on
stateful switchover of LMs
forwarding rates on
stateful switchover of LMs
ES2 4G line modules
as access modules
in an LNS device for stateful switchover
as downlink modules
in an LNS device for stateful switchover
ES2 4G LMs
installed with Service IOA
support for stateful line module switchover

failover.     See switchover
file system synchronization mode
redundancy mode
forwarding controller
receives packets from interface controller
using direct memory access
tables that point to failed modules
updated with stream IDs to new primary
transfer of packets from the interface controller
not preserved during stateful line module switchover
transfer of packets to the system controller
not preserved during stateful line module switchover
usage of stream ID
to identify connections from a specific slot
forwarding controller database
mapping of the slot ID, stream ID, and traffic class
forwarding events
on egress queues
not preserving across stateful switchover of LMs
forwarding rates
on egress queues
not preserving across stateful switchover of LMs

hardware
monitoring information    1, 2
high availability
activating    1, 2
activating guidelines
deactivating    1, 2
IP interface priority    1, 2
overview
high availability mode
redundancy mode
high availability mode, line modules
brief pause in data forwarding
when secondary module becomes primary
initial bulk transfer of data
to newly assigned primary module
no impact on existing user sessions
synchronization of state and dynamic configuration
between primary and secondary LMs
transaction-based mirroring subsequently
to newly assigned primary module
high availability pair
of line modules
unified ISSU disabled on the secondary
unified ISSU support on the primary
high availability, line module     See stateful line module switchover
high availability, line modules
activating
launching Redundancy Configuration mode
specifying slots of primary and secondary modules
activating guidelines
deactivating
deactivating guidelines
error message displayed
when maximum limit is exceeded for pairs configured
maximum pairs that can be configured

icr cluster
ICR commands
interface
icr interface
ICR Options
icr-control-interface
priority command
timers-learn command
ICR Partition
configuring    1, 2, 3, 4, 5
configuring, naming
radius
ICR partition accounting
and dependence on Acct-Stop messages
configuring
disabling and enabling messages
sent to the RADIUS server
overview
processing in different scenarios
administrative switchover
complete chassis failure
line module or interface failure
transition of ICR partition states
ICR Partition commands
naming
ICR partition ID VSA
including in access and accounting messages
ICR Partition ID VSA
transmitting to the virtual router
where ICR control interface is configured
where ICR partition is configured
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
master ICR partition, S-VLAN based grouping
ICR RADIUS commands
inclusion of icr-partition-id
radius icr-partition-accounting
icr-partition
in-service software upgrade.     See unified ISSU
initializing
high availability state
initializing, line module high availability state
completion of operation
transition to active state
crtieria not met or previously matching criteria not complied
shifts to disabled state
events that occur
bulk synchronization of memory
mirroring of state and dynamic configuration
presence of unsupported application
shifts to disabled state
when a switchover occurs
system cold-restarts
Interchassis Redundancy
heterogenous icr clusters
icr clusters
icr partition
interface controller
forwards packets to system controller
using direct memory access
using Ethernet channel
operational image that runs on
and stateful line module switchover
receives packets destined for forwarding controller
using Ethernet channel
receives packets destined for system controller
using direct memory access
Interim-Acct messages
ICR Partition ID VSA
IOA slots
and SRP module combination
compatible with stateful line module switchover
IP addresses
IP address owner, VRRP
primary, VRRP
VRRP    1, 2
ip commands     See also vrrp commands
ip address
ip vrrp
ip vrrp accept-data
ip vrrp advertise-interval
ip vrrp authentication-key
ip vrrp authentication-type
ip vrrp enable    1, 2
ip vrrp preempt
ip vrrp priority    1, 2
ip vrrp track
ip vrrp virtual-address    1, 2
ip pim commands
ip pm dr-priority
ISSU.     See unified ISSU

L2TP
after switchover to the secondary module occurs
restores operation data to the new primary
configuration and operation data
maintained in the line module
mirrored to the standby module
on the SRP module
handles line module events
restoration of configuration to the new primary
similarity with warm start during unified ISSU
L2TP tunnels
data packets received on
preventing requests from LAC devices for sequence numbering
sequence number checking for
LEDs
monitoring status
line module high availability     See stateful line module switchover
line module high availability states
active
disabled
initializing
line module redundancy
configuring
managing
modules enabled for
cannot be configured in a high availability pair
overview
requirements
E120 and E320 Routers
ERX7xx models and ERX14xx Models
line modules
applications that support
stateful switchover
behavior of system functions
with stateful switchover configured
cold switchover of
loss of existign subscriber sessions
same behavior as line module redundancy
on E120 and E320 routers, components
forwarding controller
input/output adapter
interface controller
replacing
when stateful switchover is enabled
stateful switchover of
active or primary module
packet processing by the router
standby or secondary module
warm switchover of
preservation of subscriber sessions
with downlink interface to the LAC, reloading
not retaining user sessions during stateful switchover
not retaining user sessions with line module redundancy
LNS devices
ES2 4G LMs as access modules
and stateful line module switchover
ES2 4G LMs as downlink modules
and stateful line module switchover
LNS sessions
stateful switchover of
for routers that act as LNS devices
supported module and IOA combinations
log messages
generated for stateful line module switchover
in response to manual settings
in response to system events
stateful line module switchover
transition between switchover states    1, 2
transition from active to disabled state
transition from disabled to active state
when HA is enabled
stateful SRP switchover
transition from pending to active state
when HA is enabled    1, 2, 3

manuals
comments on
master router
Module Redundancy
switching example
primary Line Module, Spare Line Module
modules
monitoring information    1, 2

notice icons

pending
high availability state
performance impact
maximum tunneled PPP sessions
on the primary line module
platform considerations
high availability
stateful line module switchover
policy application
downloading policy attachments
using the SRP module
in the line module
policy definitions not stored in
transmission of policy attachments from SRP to LM
in a bulk manner
policy attachments
transfer in a bulk operation
from SRP to line module
reduced time for download
policy manager
stateful line module switchover safe
download of policy attachments
preservation of statistics after switchover
policy statistics
preserved across line module switchover
green bytes and packets
red bytes and packets
saturated bytes and packets
transmit-unconditional bytes and packets
upper green bytes and packets
upper red bytes and packets
upper yellow bytes and packets
yellow bytes and packets
PPP accounting statistics
preserved across line module switchover
Acct-Input-Octets RADIUS attribute
Acct-Input-Packets RADIUS attribute
Acct-Output-Octets RADIUS attribute
Acct-Output-Packets RADIUS attribute
IPv6-Acct-Input-Octets RADIUS attribute
IPv6-Acct-Input-Packets RADIUS attribute
IPv6-Acct-Output-Octets RADIUS attribute
IPv6-Acct-Output-Packets RADIUS attribute
PPP application
after stateful line module switchover
replication of sessions on standby module
components on the line module
basic protocol
state machines in a running state
timers
echo requests for sessions on ES2 4G LM
handled by access module
echo requests for sessions on failed module
redirection to a different hardware
expiry of keepalives
time for the new primary to become active
mirrored storage data
reconstruction of
sessions alternating between up and down states
not retained during switchover
time for standby module to become active
dependent on configuration settings
PPP echo reply messages
sent from access modules in LNS
in response to echo requests from clients
PPP echo requests
handling by access module in LNS
during stateful switchover
stoppage of handling by access module in LNS
after stateful switchover is complete
PPP subscriber sessions
on an LNS device in L2TP tunnels
echo requests handled by access module
terminated due to lack of keepalive responses
primary line module
actions that trigger stateful switchover
disabling the slot
graceful switchover to secondary module
reloading the slot
collection of statistics from
for policy manager
for PPP applications
disabling the slot
disabling the slot of
secondary module becomes the primary
erasing the slot of
primary and secondary modules are cold booted
failure of
retaining active user sessions
running of diagnostic functions
stateful switchover to secondary module
subscriber disconnection for two minutes
performance impact, stateful switchover
maximum tunneled PPP sessions
reloading the slot of
secondary module becomes the primary
software fault occurs on
secondary module becomes the primary
timeout value
to reach the online state after router reboot

QoS
agent clients bind and register
to the QoS agent
configuration stored in line modules
settings mirrored to standby module
stateful line module switchover support
restoration of queues on subscriber interfaces
queue manager
agent running on line modules
handling of forwarding controller updates
agents reside on line modules
initiation of requests to the connection manager
on reception of the controller up event
resides on the SRP
usage of queue ID
to identify connections

RADIUS
rebooting of the router
stateful line module switchover configured
primary module reaches online state
secondary module is not an online state
timeout for primary module to become online
recovery of routers
from double failures
not supported
redundancy
line module.     See line module redundancy
SRP module.     See SRP module redundancy
redundancy commands
redundancy force-switchover    1, 2, 3
redundancy lockout
redundancy revert
redundancy revertive
srp switch
redundancy modes
high availability
redundancy modes, line modules
high availability
stateless switchover
removal of IOAs
without powering down
stateful line module switchover not triggered
replacement of line modules
stateful line module switchover enabled, action taken for failures
cold and warm switchovers of LMs in a HA pair
disabling the slots in which the LMs in a HA pair reside
reloading slot in which LMs in a HA pair reside
reloading the primary line module
reloading the secondary line module
removing IOAs from LMs in a HA pair without powering down
without erasing the interface settings
resetting of subscriber sessions
with stateful line module switchover disabled, dependency on
configuration parameters applied
number of active user sessions
router models in network

secondary line module
disabling the slot
disabling the slot of
cold boot is performed
erasing the slot of
line module high availability is disabled
mirroring of
subscriber details from failed primary
performance impact, stateful switchover
newly provisioned
preservation of active sessions
after a stateful switchover
reloading the slot of
cold boot is performed
software fault occurs on
cold boot is performed
taking over as
primary after stateful switchover
taking over as primary, timeout exceeded for primary
after system reboot
taking over as the primary
recovery of applications to a stable state
sequence number checking
for packets on L2TP tunnels
not maintained during stateful switchover of LMs
setting recommendation for stateful switchover of LMs
Service Availability
Features
ICR
Module redundancy
Stateful Line Module Switchover
Stateful SRP Switchover
Unified ISSU
VRRP
show icr commands
show icr-partition
show icr-partitions
state
summary
show ip commands
show ip vrrp    1, 2
show ip vrrp brief    1, 2
show ip vrrp neighbor
show ip vrrp neighbors
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
show issu brief
show issu detail
show redundancy commands
show environment    1, 2
show hardware    1, 2
show redundancy
show redundancy clients
show redundancy clients all
show redundancy detail
show redundancy history
show redundancy history detail
show redundancy history line-card slot
show redundancy history line-card slot detail
show redundancy line-card
show redundancy line-card slot
show redundancy srp
show redundancy srp detail
show redundancy switchover-history
simultaneous switchover of
SRP and line modules
not supported
SRP module redundancy
managing
SRP modules
installing a redundant module
paired with IOAs
support for stateful line module switchover
reset button
simultaneous switchover with line modules
not supported
stateful line module switchover
1:1 redundancy model
access modules in an LNS device
actions that trigger
disabling the slot of the primary module
graceful switchover to secondary module
rebooting the slot of the primary module
activating
activating guidelines
active module, primary
advantages of functionality
1:1 redundancy model
seamless preservation of subscriber sessions
and line module redundancy
cannot be enabled simultaneously
and stateful SRP switchover
configured and active on the same router
applications that do no support
applications that support
connection manager
forwarding controller
interchassis control protocol
L2TP
mirroring subsystem
policy manager
PPP
QoS
unified ISSU
available on the operational image
that runs on the interface controller
behavior of system functions
configured and disabled on LMs
configured and enabled on LMs
interoperation with line module redundancy
interworking with stateful SRP switchover
LM is in active or disabled switchover state
when the router is rebooting
when unified ISSU is performed
benefits of
enhanced reliability and resiliency
preservation of active client sessions
recovery of applications to a stable state
undisrupted forwarding of data
deactivating
deactivating guidelines
differences in keywords of commands
with stateful SRP switchover
disabled
forcible termination of user sessions
downlink modules in an LNS device
enabled on the router
retaining existing client connections
synchronization of applications to a stable state
uninterrupted forwarding on interfaces
for LNS sessions
active and standby Service IOAs supported
compatible SRP and SFM models
downlink and uplink LMs in an L2TP tunnel
L2TP tunnels and sessions supported
with the router as an LNS in an L2TP tunnel
forwarding controller tables
updated with stream IDs to new primary
guidelines for configuring
historical record of, not preserving
drop events on egress queues
drop rates on egress queues
forwarding events on egress queues
forwarding rates on egress queues
hot-swap of the IOA
in a managed environment
improving router availability
independent of stateful SRP switchover
interworking with unified ISSU
not supported on the secondary line module
supported on the primary line module
log messages
transition from active to disabled state
transition from disabled to active state
log messages generated during
in response to manual settings
in response to system events
maximum pairs that can be configured
modules enabled for
cannot be configured in a redundancy group
mutually exclusive of
line module redundancy
non-support of
1:N hot standby mode
automatic switchover of serial connection
not preserving packets flowing
between forwarding and interface controllers
between forwarding and system controllers
overview
performance impact
insertion of new secondary module
maximum PPP sessions on primary module
primary line module
continuation of data forwarding after failure of
failure of
mirroring of user sessions
scenarios of configuration
secondary line module
mirroring of subscriber sessions from primary
not preserving fluctuating sessions
taking over as primary
sequence number checking
for data packets on L2TP tunnels
similarity in cnonfiguration commands
with stateful SRP switchover
spare or standby module, secondary
supported line module, IOA combination
supported LM and IOA combinations
for stateful switchover of LNS sessions
system operations when enabled on the router
unavailable for setting up
forcible termination of user sessions
using status LEDs for monitoring
states of line modules
viewing
detailed history information for line module in a slot
information about starts and switchovers for line module in a slot
redundancy setting of line module in a slot
stateful line module switchover commands
line-card switch
line-card switchmode high-availability slot
stateful line module switchover, scenarios
not supported in software releases
restart of line modules
setting disabled on the router
disconnection of user sessions
excessive time for rebuilding user sessions
reestablishment of client connections
restart of line modules
stateful SRP switchover
configuration independent of
stateful line module switchover
differences in keywords of commands
with stateful line module switchover
disruption of connection between ICs
reestablishment of ICC sessions
switch relearns MAC addresses
does not prevent root cause of reload or restart
similarity in behavior with stateful line module switchover
log messages
transition from pending to active state
similarity in configuration commands
with stateful line module switchover
simultaneously performed with
stateful line module switchover, double fault
stateful SRP switchover., See also high availability
stateless switchover mode, line modules
default behavior for redundant LMs
system events that occur
temporary halt in working of I/O modules
states
high availability
statistics
for policy manager
collection frequency from primary module
polling and sending to secondary line module
for PPP applications
collection frequency from primary module
polling and sending to secondary line module
last collected value used as baseline
on the primary line module
status LEDs
monitoring redundancy state of SRP and line modules
OK LED
ONLINE LED
REDUNDANT LED
status LEDs, monitoring
subscriber sessions
preservation of active
during stateful line module switchover
support, technical     See technical support
switchover
stateless

technical support
contacting JTAC
text and syntax conventions
transmission of packets
between forwarding and interface controllers
not preserved during stateful line module switchover
between forwarding and system controllers
not preserved during stateful line module switchover

unified ISSU
disabled on the secondary module
in a high availability pair
support on primary module
in a high availability pair
unified ISSU (in-service software upgrade)
AAA support
application support
ATM support
ATM port date rate
ILMI sessions
OAM CC effects
OAM VC integrity
VC and VP statistics
DHCP support
common component
external server
packet capture
relay and relay proxy
DHCP support:relay and relay proxy
DoS protection support
Ethernet support
ARP entries
LAG
port data rate
VLAN statistics
FTP support
halting during initialization
halting during upgrade
initialization phase
application data on standby SRP module
line module arming
SNMP traps
interoperation with
stateful line module switchover
IPv6
IS-IS support
graceful restart
high link cost
L2TP support
layer 3 protocol traffic forwarding
OSPF support
dead interval
graceful restart
high link cost
overview
phases
initialization
overview of
service restoration
upgrade
PIM support
platform
procedure for upgrade
references
requirements
hardware    1, 2
software
traffic forwarding
verification in upgrade phase
restoring original router state    1, 2
router behavior
service restoration phase    1, 2
SONET/SDH support
subscriber support
logins
statistics
support, application
T3 support
TACACS+ support
terms
timer settings for routing protocol timers
upgrade phase
exceptions
line module control plane
line module forwarding plane upgrade
process steps
setup
SRP module switchover
verification requirements
upgrade procedure
unified ISSU (in-service software upgrade):DHCP support
local server
upgrading software
high availability

virtual MAC address
virtual router ID (VRID).     See VRID
Virtual Router Redundancy Protocol (VRRP).     See VRRP
VRID (virtual router ID)
configuration
creating    1, 2
router election rules    1, 2
vrrp
platform
VRRP
VRRP (Virtual Router Redundancy Protocol)
advertisement interval
advertisement messages
authentication key
authentication type
backup router    1, 2, 3, 4, 5
configuration examples    1, 2, 3
configuring
how it works
implementation    1, 2
MAC address
master router
monitoring    1, 2, 3, 4
overview
preemption    1, 2
router election rules    1, 2
router priority
VLAN support
VRRP router defined
vrrp commands
ip vrrp
ip vrrp accept-data
ip vrrp advertise-interval
ip vrrp authentication-key
ip vrrp authentication-type
ip vrrp enable    1, 2
ip vrrp preempt    1, 2
ip vrrp priority
ip vrrp track
ip vrrp virtual-address
VRRP commands
icr

warm restart
IP interface priority    1, 2
warm restart, line modules
events that occur
denial of new user session login attempts
preservation of active user sessions
preservation of data forwarding through chassis
prevention of configuration changes