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Chapter 11: AI2524 Sync PPP Configuration Steps
August 1997 Page 11-17
2524UM
Disable or
Reenable Peer
Neighbor Routes
The Cisco IOS software automatically creates neighbor routes by de-
fault; that is, it automatically sets up a route to the peer address on
point-to-point interface when the PPP IPCP negotiation is completed.
In interface configuration mode, disable this default behavior o
reenable it once it has been disabled:
z
Disable creation of neighbor routes.
no peer neighbor-route
z
Reenable creation of neighbor routes.
peer neighbor-route
Note: If entered on a dialer or async-group interface, this
command affects all member interfaces.
Configure PPP
Half-Bridging
For situations in which a routed network needs connectivity to a re-
mote bridged Ethernet network, a serial or ISDN interface can be con-
figured to function as a PPP half-bridge. The line to the remote bridge
functions as a virtual Ethernet interface. The router's serial or ISDN in-
terface functions as a node on the same Ethernet subnetwork as the re-
mote network.
The bridge sends bridge packets to the PPP half-bridge, which con-
verts them to routed packets and forwards them to other router pro
cesses. Likewise, the PPP half-bridge converts routed packets to
Ethernet bridge packets and sends them to the bridge on the sam
Ethernet subnetwork.
Note: An interface cannot function as both a half-bridge and a
bridge.
Figure 11-1
shows a router with a serial interface configured as a PPP
half-bridge. The interface functions as a node on the Ethernet subnet-
work with the bridge. Note that the serial interface has an IP address
on the same Ethernet subnetwork as the bridge.