MPLS Guide MPLS and RSVP-TE
3HE 18686 AAAB TQZZA © 2022 Nokia.
Use subject to Terms available at: www.nokia.com
31
3.2.3.3 Entropy Label on OAM Packets
Service OAM packets also include an entropy label and ELI if entropy label capability
is signaled for the corresponding tunnel and entropy label is enabled for the service.
The EL/ELI pair is inserted at the same level in the label stack as it is in user data
packets; that is, within the innermost LSP label context closest to the service payload
that has advertised entropy label capability. The EL/ELI pair will therefore always
reside at a different level in the label stack from special-purpose labels related to the
service payload (for example, the router alert label).
OAM packets at the LSP level, such as LSP ping and LSP trace, do not have the EL/
ELI pair inserted.
3.2.3.4 Segment Routing Entropy Label and IPSec, ESPI Hashing,
and NGE
Segment routing with entropy label can be used with IPSec and NGE services and
with ESPI hashing, as listed below:
• IPSec and segment routing entropy label
- IPSec over BGP 3107 over segment routing with entropy label
- IPSec over static route over segment routing with entropy label
- VLL over GRE over IPSec over BGP 3107 over segment routing with
entropy label
- VLL over GRE over IPSec over static route over segment routing with
entropy label
• ESPI hashing GRT/VPRN
•NGE
- VLL, VPLS, and VPRN NGE interaction with entropy label
3.2.3.5 Entropy Label Configuration
Figure 3 illustrates the use of entropy labels at the service level.
The iLER has entropy label enabled under an applicable service context and the
eLER has entropy label capability enabled. The iLER inserts the ELI and the EL into
the label stack. The entropy label value is based on the service ID for point-to-point
Layer 2 services.
To Next Page
Loading...
Need help?
General
