JUNOS Internet Software Network Operations Guide: Hardware
472 ! Routing Engine, Host Module, and Host Subsystem Redundancy Connections
Redundancy Connection for an M40e or M160 Router
Figure 189 shows the connection between the master and backup host modules on
an M40e or M160 router. Keepalive messages are sent from one Routing Engine to
the other over the
fpx2 interface found across the Peripheral Component
Interconnect (PCI) bridge. The keepalive message is received by the other host
module via the
fpx1 interface. A keepalive response is sent back over the fpx2
interface to the other Routing Engine. In this way, the master and the backup host
modules exchange state information.
Figure 189: Redundancy Connection for an M40e or M160 Router
Master Host Module
RE0
MCS0 MCS1
RE1
Backup Host Module
FXP2
keepalive messages
physical connection
g002280
Switch Switch
FXP2
FXP1FXP1
PCI bridge PCI bridge
To Next Page
Loading...
Need help?
General
