Exchanging Tunnel-Server Modules - Juniper JUNOSE 11.2.X PHYSICAL LAYER Configuration Manual

JunosE 11.2.x Physical Layer Configuration Guide

Exchanging Tunnel-Server Modules

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NOTE: When you direct the router to reserve a percentage of the total bandwidth for
forwarding, you may not always obtain the exact percentage of bandwidth specified.
Because of the overhead involved with identifying and assigning incoming traffic to the
appropriate resources, you may obtain a value less than the configured value. For
instance, if you reserve 50 percent of the total bandwidth for forwarding, you will not
obtain an actual bandwidth of 5 Gbps for forwarding and 5 Gbps for tunnel processing.
Tunnel-server modules are available in different hardware revisions that support varying
numbers of tunnel-service interfaces. For more information about determining the
hardware revision on a module, see ERX Module Guide, Table 1, Module Combinations, or
E120 and E320 Module Guide, Table 1, Modules and IOAs.
When you exchange a tunnel-server module with a lower capacity for tunnel-service
interfaces with a module that supports a higher capacity, the tunnel-server port maintains
the original number of provisioned tunnel-service interfaces. By using the all-available
keyword with the max-interfaces command, you can configure the tunnel-server port
to automatically adjust the number of provisioned tunnel-service interfaces to the
maximum value supported by the new module.
When you exchange a tunnel-server module that has a higher number of provisioned
interfaces than the new module's capacity, the module adjusts the provisioned number
of interfaces to the maximum value that the module supports.
Table 25 on page 216 displays sample capacity, configuration, and utilization values for
exchanging tunnel-server modules with different capacities.
Table 25: Sample Capacity, Configuration, and Utilization Values for
Tunnel-Service Interfaces
Old Provisioned
Interfaces
Old (max-interfaces
Capacity command)
8000 5000
8000 8000
8000 all-available
16,000 5000
16,000 16,000
16,000 all-available
New Provisioned
Interfaces
Old New (max-interfaces
Utilization Capacity command)
5000 16,000 5000
8000 16,000 8000
8000 16,000 all-available
5000 8000 5000
16,000 8000 8000
16,000 8000 all-available
Copyright © 2010, Juniper Networks, Inc.
New
Utilization
5000
8000
16,000
5000
8000
8000