Inserting And Processing The Entropy Label - Nokia 7705 SAR-W Series Manual

Service aggregation router, mpls

Table of Contents

This section contains inserting and processing information on the following node

The procedures at the iLER are as specified in section 4.2 of RFC 6790. In general,

the router inserts an entropy label into the label stack if the downstream node for the

LSP tunnel has signaled support for entropy label and the entropy label is enabled

for the particular service.

RFC 6790 specifies that the iLER can insert several entropy labels in the label stack

where the LSP hierarchy exists, one for each LSP in the hierarchy. However, this

could result in unreasonably large label stacks. Therefore, when there are multiple

LSPs in a hierarchy (for example, LDP over RSVP-TE), the router only inserts a

single EL/ELI pair within the innermost LSP label closest to the service payload that

has advertised entropy label capability.

3HE 18686 AAAB TQZZA

Summary of Entropy Label Support (Continued)

IGP shortcut

SR FRR over TI-LFA or R-LFA

Static route with tunnel next hop

1. On the SR segment because the SR head end injects the entropy label.

2. For services that support entropy label.

Inserting and Processing the Entropy Label

Use subject to Terms available at: www.nokia.com

MPLS and RSVP-TE