Configuring Bit-Error-Triggered Vpn Route Switching - Huawei NetEngine80E Configuration Manual - Reliability

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability

10.8 Configuring Bit-Error-Triggered VPN Route Switching

This section describes how to configure bit-error-triggered virtual private network (VPN) route
switching.
Context
In a hierarchy virtual private network (H-VPN) scenario in which a Resource Reservation
Protocol-Traffic Engineering (RSVP-TE) tunnel with traffic engineering (TE) hot-standby
protection carries services and VPN fast reroute (FRR) is configured, you can configure bit-
error-triggered VPN route switching in addition to bit-error-triggered RSVP-TE tunnel
switching. If the primary and backup constraint-based routed label switched paths (CR-LSPs)
of the RSVP-TE tunnel are both in the excessive bit error rate (BER) state or the TE hot-standby
CR-LSP fails and bit-error-triggered RSVP-TE tunnel switching cannot protect services against
bit errors, bit-error-triggered VPN route switching can do so.
Figure 10-1
protection carries Layer 3 virtual private network (L3VPN) services. VPN FRR is configured
on the user-end provider edge (UPE). If the primary and backup CR-LSPs of the RSVP-TE
tunnel are both in the excessive BER state or the TE hot-standby CR-LSP fails, bit-error-
triggered RSVP-TE tunnel switching cannot protect traffic against bit errors. To resolve this
problem, configure bit-error-triggered VPN route switching on the UPE and SPE1. Bit-error-
triggered VPN route switching triggers VPN route convergence in the case of a bit error event,
diverting traffic from the link that has encountered the bit error event.
Figure 10-1 Networking diagram for bit-error-triggered VPN route switching
Pre-configuration Tasks
Before configuring bit-error-triggered VPN route switching, complete the following tasks:
l
l
Issue 02 (2014-09-30)
shows an H-VPN scenario in which an RSVP-TE tunnel with TE hot-standby
VPN Site
CE
Configure VPN FRR.
Configure bit-error-triggered RSVP-TE tunnel switching.
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10 Bit-Error-Triggered Protection Switching Configuration
Backbone
UPE
RSVP-TE Tunnel
SPE1
NPE
SPE2
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