Line Module Redundancy; Mlppp; Mpls - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - RELEASE NOTES 2010-11-09 Release Note

Line Module Redundancy

MLPPP

MPLS

Copyright © 2010, Juniper Networks, Inc.
On E120 routers and E320 routers, redundant IOAs have a temperature sensor, and

the show environment all command lists the temperature of IOAs in their associated
slots.
On ERX routers, redundant I/O modules do not have a temperature sensor.
Therefore, the show environment all command output lists the primary I/O module
temperature in the slot of the line module that is responsible for the I/O module.
When you install an ES2-S1 Redundancy IOA with a hardware revision number of -02

or less in slot 0 or slot 11 of the E320 router or in slot 0 or the E120 router, do not install
an OCx/STMx ATM IOA or an OCx/STMx POS IOA in the lower (E320) or left (E120)
adapter bay of slot 1 or slot 12. When the spare line module is controlling another slot
and you revert back to the primary line module, the ATM or POS IOAs can become
unusable or cause the line module to reset. [Defect ID 69760]
Work-around: This problem is not present for ES2-S1 Redundancy IOAs with a
hardware revision number of -03 or higher.
Do not configure both MLPPP fragmentation (with the ppp fragmentation

command) and IP fragmentation of L2TP packets (with the ip mtu command) on
the same interface. Instead, you must choose only one of the fragmentation
configurations by setting it to the necessary value and set the other fragmentation
configuration to the maximum allowable value.
Martini circuits configured on the ES2 10G LM act as true layer 2 tunnels, without

modifying the layer 2 headers. For this reason, Martini VLAN retagging is not currently
supported.
If you are upgrading to Release 7.1.0 or a higher-numbered release from a release

numbered lower than Release 7.1.0, and have inter-AS option B or C configurations,
you must explicitly configure MPLS on all inter-AS links, as in the following example:
host1#configure terminal
host1(config)#interface fastEthernet 2/0
host1(config-if)#ip address ...
host1(config-if)#mpls
If you do not explicitly configure MPLS on the links, the inter-AS feature will not work
properly. You cannot use an underscore character (_) in an MPLS tunnel name.
When you upgrade the router to JunosE Release 7.1.0 or a higher-numbered release

from a release numbered lower than Release 7.1.0, remote ATM layer 2 over MPLS
circuits (also known as MPLS shim interfaces) that use Martini encapsulation are
erroneously signaled with the control word attribute setting "Control word is not
preferred by default". Because control words are required for these MPLS shim
interfaces, these circuits should instead be signaled with the setting "Control word is
preferred by default".
Work-around: To reinstate the proper setting ("Control word is preferred by
default"), remove the MPLS shim interface from the ATM subinterface and then
reconfigure it.
Release 11.3.0
Known Behavior 29