Cisco Cisco IOS Software Release 12.4(9)T
Mobile IP—Mobile Router Multipath Support
Restrictions for Mobile Router Multipath Support
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Cisco IOS Release 12.4(9)T
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Restrictions for Mobile Router Multipath Support
In a single-tunnel scenario, you can configure a default route through an interface to the home agent to
help with collocated care-of address registrations. Do not use this configuration if your mobile router is
configured for multipath support because it would defeat the purpose of multipath support.
help with collocated care-of address registrations. Do not use this configuration if your mobile router is
configured for multipath support because it would defeat the purpose of multipath support.
Information About Mobile Router Multipath Support
Before you configure the Mobile Router Multipath Support feature, you should understand the following
concepts:
concepts:
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Mobile Router Multipath Support Feature Design
The Mobile Router Multipath Support feature extends the mobile router functionality to multiple
interfaces. Before the introduction of this feature, the mobile router received agent advertisements on
multiple roaming interfaces. However, it would register through only one interface and set up the tunnel
and routes based on that registration. During the routing or tunneling phase, packets arrive at the home
agent. The home agent performs two encapsulations of the packets and tunnels them to the foreign agent.
The foreign agent performs one de-encapsulation and forwards the packets to the mobile router, which
performs another de-encapsulation. The mobile router then forwards the original packets to the IP
devices on the mobile networks. See
interfaces. Before the introduction of this feature, the mobile router received agent advertisements on
multiple roaming interfaces. However, it would register through only one interface and set up the tunnel
and routes based on that registration. During the routing or tunneling phase, packets arrive at the home
agent. The home agent performs two encapsulations of the packets and tunnels them to the foreign agent.
The foreign agent performs one de-encapsulation and forwards the packets to the mobile router, which
performs another de-encapsulation. The mobile router then forwards the original packets to the IP
devices on the mobile networks. See
for an illustration of routing within a mobile network using
a single tunnel.