Juniper JUNOSE 11.2.X MULTICAST ROUTING, Configuration Manual

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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.
Exchanging Tunnel-Server Modules
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
New
Utilization
New Provisioned
Interfaces
(max-interfaces
command)
New
Capacity Old
Utilization
Old Provisioned
Interfaces
(max-interfaces
command)
Old
Capacity
5000 5000 16,000 5000 5000 8000
8000 8000 16,000 8000 8000 8000
16,000 all-available 16,000 8000 all-available 8000
5000 5000 8000 5000 5000 16,000
8000 8000 8000 16,000 16,000 16,000
8000 all-available 8000 16,000 all-available 16,000
Copyright © 2010, Juniper Networks, Inc. 216
JunosE 11.2.x Physical Layer Configuration Guide