Adjacency statistics:
30 hello recv, 29 hello sent, 0 bad hello recv
adj setup time = 00:02:19
last hello recv time = 00:00:00, last hello sent time = 00:00:00
queue 0: traffic class best-effort, bound to atm-vc ATM9/0.10
Queue length 0 bytes
Forwarded packets 1, bytes 148
Dropped committed packets 0, bytes 0
Dropped conformed packets 0, bytes 0
Dropped exceeded packets 0, bytes 0
Related Topics MPLS Label Switching and Packet Forwarding Overview on page 218•
• MPLS Forwarding and Next-Hop Tables Overview on page 233
• MPLS Interfaces and Interface Stacking Overview on page 236
• Topology-Driven LSPs Overview on page 255
• MPLS Packet Spoof Checking Overview on page 234
• Statistics for IP Packets Moving On or Off MPLS LSPs on page 231
MPLS Forwarding and Next-Hop Tables Overview
An MPLS forwarding table determines how MPLS handles received MPLS packets. When
an MPLS packet arrives on an MPLS major interface, MPLS looks up the outermost MPLS
label of the received packet in the relevant MPLS forwarding table.
The entries in the MPLS forwarding table map labels to next hops. Each entry in the MPLS
forwarding table points to an entry in the MPLS next-hop table. Each MPLS next hop
points to either an interface or another MPLS next hop. The chain of MPLS next hops,
which ends at an interface, informs MPLS which labels to push and where to send the
MPLS packet.
For RSVP-TE tunnels, minor interfaces are created in addition to the forwarding table
and next-hop table entries. One minor interface is created of each in/out segment of a
tunnel. the purpose of these minor interfaces is to attach QoS and policy to an LSP.
MPLS forwarding tables consist of the following:
•
One forwarding table for each MPLS virtual router. This table contains labels from the
platform label space. When an MPLS packet arrives on an MPLS major interface that
uses the platform label space, MPLS looks up the label in the MPLS forwarding table
of the virtual router in which the major interface exists.
•
One forwarding table for each MPLS major interface that uses the interface label space.
This table contains labels from the interface label space of that major interface. When
an MPLS packet arrives on an MPLS major interface that uses the interface label space,
MPLS looks up the label in the MPLS forwarding table for that particular major interface.
The signaling protocols add entries to the MPLS forwarding tables. You cannot manually
create an MPLS forwarding entry. The signaling protocols set the following attributes for
each entry placed in the forwarding table:
233Copyright © 2010, Juniper Networks, Inc.
Chapter 3: MPLS Overview
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