Juniper JUNOSE 11.2.X IP SERVICES, Configuration Manual

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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 combination of an ES2 4G 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
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
•
Use the no version to return IP tunnel reassembly to the default, disabled.
•
See ip tunnel reassembly.
271 Copyright © 2010, Juniper Networks, Inc.
Chapter 11: IP Reassembly for Tunnels