Graceful Routing Engine Switchover Dpc Support; Graceful Routing Engine Switchover And Subscriber Access - Juniper EX9200 Features Manual

Graceful Routing Engine Switchover DPC Support

Graceful Routing Engine Switchover and Subscriber Access

Copyright © 2017, Juniper Networks, Inc.
Table 4: Graceful Routing Engine Switchover Feature Support (continued)
Application
Ethernet Operation, Administration, and Management (OAM) as defined
by IEEE 802.3ah
Extended DHCP relay agent
Ethernet OAM as defined by IEEE 802.1ag
Packet Gateway Control Protocol (PGCP) process (pgcpd) on Multiservices
500 PICs on T640 routers.
Subscriber access
Layer 2 Circuit and LDP-based VPLS pseudowire redundant configuration
The following constraints apply to graceful Routing Engine switchover feature support:
When graceful Routing Engine switchover and aggregated Ethernet interfaces are
configured in the same system, the aggregated Ethernet interfaces must not be
configured for fast-polling LACP. When fast polling is configured, the LACP polls time
out at the remote end during the Routing Engine mastership switchover. When LACP
polling times out, the aggregated link and interface are disabled. The Routing Engine
mastership change is fast enough that standard and slow LACP polling do not time
out during the procedure. However, note that this restriction does not apply to MX
Series Routers that are running Junos OS Release 9.4 or later and have distributed
periodic packet management (PPM) enabled—which is the default configuration—on
them. In such cases, you can configure graceful Routing Engine switchover and have
aggregated Ethernet interfaces configured for fast-polling LACP on the same device.
NOTE: MACSec sessions will flap upon Graceful Routing Engine switchover.
Starting with Junos OS Release 13.2, when a graceful Routing Engine switchover occurs,
the VRRP state does not change. VRRP is supported by graceful Routing Engine
switchover only in the case that PPM delegation is enabled (which the default).
Graceful Routing Engine switchover supports all Dense Port Concentrators (DPCs) on
the MX Series 3D Universal Edge Routers running the appropriate version of Junos OS as
shown in "Graceful Routing Engine Switchover Platform Support" on page
information about DPCs, see the MX Series DPC Guide.
Graceful Routing Engine switchover currently supports most of the features directly
associated with dynamic DHCP and dynamic PPPoE subscriber access. Graceful Routing
Chapter 2: GRES System Requirements
Junos OS Release
8.5
8.5
9.0
9.0
9.4
9.6
11. For more
13