Configuring Dynamic Bfd For Ipv6 Is-Is - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
<HUAWEI> display isis route verbose
IPV6 Dest
Admin Tag
NextHop
IPV6 Dest
Admin Tag
NextHop
IPV6 Dest
Admin Tag
NextHop
IPV6 Dest
Admin Tag
NextHop

7.17 Configuring Dynamic BFD for IPv6 IS-IS

If high-speed data services are deployed on an IS-IS network, dynamic BFD for IPv6 IS-IS can
be configured to accelerate the fault detection speed.
Context
The NE80E/40E supports dynamic BFD for IPv6 IS-IS, but not static BFD for IPv6 IS-IS.
Without BFD, connection status between an IS-IS device and its neighbors can be monitored
only by exchanging Hello packets at intervals. The minimum allowable sending interval is 3s,
and a neighbor is declared Down after at least three intervals during which no response Hello
packet is received from the neighbor. IS-IS takes more than one second to detect that a neighbor
becomes Down, resulting in loss of a large amount of high-speed data.
BFD provides millisecond-level fault detection. After detecting a link or node failure, BFD will
notify IS-IS of the failure. Traffic is rapidly switched to the backup link or node.
Pre-configuration Tasks
Before configuring dynamic BFD for IPv6 IS-IS, complete the following tasks:
l
l
l
Issue 02 (2014-09-30)
ISIS(1) Level-2 Forwarding Table
--------------------------------
: 13:1::/64
: -
:
FE80::907D:0:103A:1
: 34:1::/64
: -
:
Direct
: 20:1::/64
: -
:
Direct
: 10:1::/64
: -
:
FE80::DC23:0:FC15:3
Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
Configure IPv6 addresses for interfaces to ensure that neighbor nodes are reachable.
Configure IPv6 IS-IS functions to ensure that each node is reachable at the network layer.
Configuring Multi-Topology for IPv6
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Route information for ISIS(1)
-----------------------------
Cost : 20
Src Count : 2
Interface :
Pos1/0/0
Cost : 10
Src Count : 2
Interface :
Pos1/0/0
Cost : 10
Src Count : 2
Interface :
Pos1/0/1
Cost : 20
Src Count : 2
Interface :
Pos1/0/1
U-Up/Down Bit Set
IS-IS.
7 IS-IS Configuration
Flags: A/-/-
Priority: Critical
ExitIndex :
0x00000007
Flags: D/L/-
Priority: -
ExitIndex :
0x00000000
Flags: D/L/-
Priority: -
ExitIndex :
0x00000000
Flags: A/-/-
Priority: Low
ExitIndex :
0x00000003
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