User guide

MPLS Module Installation and User Guide 5-21
Configuring RSVP-TE
A profile is a set of attributes that are applied to the LSP when the LSP is configured
using the
config mpls rsvp-te add lsp
command. A default profile is provided
which cannot be deleted, but can be applied to any configured LSP. The profile name
for the default profile is default. The default profile parameter values are initially set to
their respective default values. The maximum number of configurable profiles is 255
(one of which is reserved for the default profile).
The
bandwidth
parameter specifies the desired reserved bandwidth for the LSP. Any
positive integer bps value is valid. Optionally, you can append the characters, k for
kilobits, m for megabits, or g for gigabits, to the bps value to specify the unit of
measure. If the k, m, or g, character is omitted, the unit of measure is assumed to be
kilobits. The default bandwidth bps value is zero, which indicates that the QoS for the
LSP is best effort. ExtremeWare does not support bandwidth reservation.
The
setup-priority
and
hold-priority
are optional parameters indicating the LSP
priority. During path set up, if the requested bandwidth cannot be reserved through the
LSR, the
setup-priority
parameter is compared to the
hold-priority
of existing
LSPs to determine if any of the existing LSPs need to be preempted to allow a higher
priority LSP to be established. Lower numerical values represent higher priorities. The
setup-priority
range is 0 to 7 and the default value is 7. The
hold-priority
range is
also 0 to 7 and is set equal to the
setup-priority
by default. ExtremeWare does not
support LSP preemption.
The
retry-timeout
keyword specifies the maximum number of seconds the switch
allows for LSP setup. If the LSP cannot be established within
retry-timeout
seconds,
the LSP is resignaled. The default value for
retry-timeout
is 30 seconds with a
configurable range of 5 to 600 seconds. The
hop-count
parameter limits the number of
LSRs the path can traverse, including the ingress and egress router. The default
hop-count
value is 255 with a configurable range of two to 255.
After an LSP has established, the egress LSR may be optionally pinged to determine
end-to-end path connectivity. If a ping response is not received within [2 *
ping-interface
– 1] seconds, the LSP is considered unavailable. The
ping-interval
keyword specifies how frequently an ICMP echo request is transmitted to the egress
LSR IP address on the established LSP. The default
ping-interval
is zero, which
indicates no end-to-end LSP health checking is performed. You can set the
ping-interval
value to any interval between 0 and 60 seconds.
The route
metric
is used to determine if an established RSVP-TE LSP will actually be
used to send data. Whenever the configured metric is less than, or equal, to the
calculated IGP metric, the LSP is used for sending routed IP traffic. In this case, the LSP
is also used to send TLS data when the TLS tunnel is configured by specifying the
tunnel LSP endpoint IP address. Traffic is distributed across up to four equal-cost LSPs.