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Configuring IP Reassembly
ip tunnel reassembly
Copyright © 2010, Juniper Networks, Inc.
You can also create tunnels on router modules that support shared tunnel-server ports.
You can configure (provision) a shared tunnel-server port to use a portion of the module's
bandwidth to provide tunnel services. For a list of the modules that support shared
tunnel-server ports, see the ERX Module Guide.
For information about configuring tunnel services on dedicated and shared tunnel-server
ports, see Managing Tunnel Service and IPSec Service Interfaces in JunosE Physical Layer
Configuration Guide.
E120 Router and E320 Router
To configure IP reassembly on an E120 router or an E320 router, you must install an ES2
4G line module (LM) or an ES2 10G ADV LM with an ES2-S1 Service I/O adapter (IOA),
or an IOA that supports the use of shared tunnel-server ports. For information about
installing modules in these routers, see the E120 and 320 Hardware Guide.
The combination of an ES2 4G LM or an ES2 10G ADV LM with an ES2-S1 Service IOA
provides a dedicated tunnel-server port that is always configured on the IOA. Unlike SMs,
the ES2 4G LM and the ES2 10G ADV LM require the ES2-S1 Service IOA to condition it
to receive and transmit data to other line modules. The ES2-S1 Service IOA also does
not have ingress or egress ports.
You can also configure IP reassembly on IOAs that support shared tunnel-server ports.
You can configure (provision) a shared tunnel-server port to use a portion of the IOA's
bandwidth to provide tunnel services. For a list of the IOAs that support shared
tunnel-server ports, see the E120 and 320 Module Guide.
For information about configuring tunnel services on dedicated and shared tunnel-server
ports, see Managing Tunnel Service and IPSec Service Interfaces in JunosE Physical Layer
Configuration Guide.
You can enable IP reassembly on a virtual router basis. Also, on a systemwide basis, you
can control how the router handles verification of sequence numbers in data packets
that it receives on L2TP tunnels.
Use to enable the reassembly of fragmented IP tunnel packets that are received on
the current virtual router.
You configure tunnel reassembly on VPN routing and forwarding routers independent
of the tunnel reassembly configuration on the parent virtual router.
Example—Enables reassembly for virtual router vr12 and disables reassembly for virtual
router vr8
host1:vr12(config)#ip tunnel reassembly
host1:vr12(config)#virtual-router vr8
host1:vr8(config)#no ip tunnel reassembly
Use the no version to return IP tunnel reassembly to the default, disabled.
See ip tunnel reassembly.
Chapter 11: IP Reassembly for Tunnels
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