Information Technology Reference
In-Depth Information
Controlling Neighbors
By default, any neighbor can make an RSVP request. To control which RSVP neighbors make
requests, you use the
ip rsvp neighbor
access-list-number
command.
Example 11-11 shows how to configure the router to accept only RSVP requests from 192.168.1.1
on the Ethernet interface.
Example 11-11
Configuration to Control RSVP Neighbors
access-list 50 permit 192.168.1.1
!
interface ethernet 0
ip address 192.168.1.4 255.255.255.0
ip rsvp bandwidth
ip rsvp neighbor 50
RSVP
show
Commands
Several commands can monitor RSVP. Table 11-1 describes each command.
Table 11-1
Commands to Monitor RSVP
Command
Description
show ip rsvp interface
[
type number
]
Displays RSVP-related interface information
show ip rsvp installed
[
type number
]
Displays RSVP filters and bandwidth information
show ip rsvp neighbor
Displays current RSVP neighbors
show ip rsvp sender
Displays RSVP sender information
show ip rsvp request
Displays RSVP request information
show ip rsvp reservation
Displays RSVP receiver information
Multiprotocol Label Switching (MPLS)
MPLS provides ways to perform traffic engineering, to guarantee bandwidth or set paths, and
to enable Virtual Private Networks (VPNs). It specifies ways that Layer-3 traffic can be mapped
to connection-oriented Layer-2 transport protocols, such as ATM. It adds a label containing spe-
cific routing information to each IP packet that directs traffic through explicitly defined paths,
and it allows managers to implement policies that assign labels to various CoS. This enables the
managers to offer different CoS to different traffic types or from different customers. The poli-
cies could send traffic over a path that is not necessarily the path with the lowest routing metric.
With MPLS, service providers can provide VPN services and scale those services for many
customers.
In a MPLS environment, forwarding is based on the lookup of the MLPS label and not the
Layer-3 IP address. Labels are inserted at the edge of the MPLS network and removed when
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