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data to other line modules with access to ingress and egress ports on their own
associated I/O modules.
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) 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 ES2 4G LM and ES2-S1 Service IOA combination provides a dedicated
tunnel-server port that are always configured on the IOA. Unlike SMs, the ES2 4G
LM requires 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.
Configuring IP Reassembly
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.
ip tunnel reassembly
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
Chapter 11: IP Reassembly for Tunnels
Configuring IP Reassembly
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