Example
# Run the
display ip routing-table
ip-address
mask-length
verbose
command to view detailed
information about the IPv4 ARP Vlink direct route 10.1.1.4/32.
<HUAWEI>
display ip routing-table 10.1.1.4 32 verbose
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Table : Public
Summary Count : 1
Destination: 10.1.1.4/32
Protocol: Direct Process ID: 0
Preference: 0 Cost: 0
NextHop: 10.1.1.4 Neighbour: 0.0.0.0
State:
Active Adv
Age: 03h43m20s
Tag: 0 Priority: high
Label: NULL QoSInfo: 0x0
IndirectID: 0x0
RelayNextHop: 0.0.0.0 Interface: Vlanif10
TunnelID: 0x0 Flags: D
The command output shows that the route status is
Active Adv
, indicating that the route is active
and can be advertised.
1.16 Configuring the Advertisement of IPv6 NDP Vlink
Direct Routes on the Public Network
On an IPv6 public network, advertising IPv6 neighbor discover protocol (NDP) Vlink direct
routes allows precise control of data traffic.
1.16.1 Before You Start
Before advertising IPv6 NDP Vlink direct routes on the public network, familiarize yourself
with the usage scenario, complete the pre-configuration tasks, and obtain the data required for
the configuration.
Applicable Environment
IP packets are forwarded through a specified physical interface, but cannot be forwarded through
a VLANIF interface. If packets reach a VLANIF interface, the device obtains information about
the physical interfaces using IPv6 NDP and generates relevant routing entries. The routes
recorded by the routing entries are called IPv6 NDP Vlink direct routes.
In most cases, IPv6 NDP Vlink direct routes are used only to guide local traffic forwarding and
are not advertised. In this manner, the scale and stability of the routing table can be controlled.
In certain situations, however, different operations have to be performed on specific routes of
VLAN users (for example, different traffic export policies have to be applied to the specific
routes to direct remote traffic). In this case, some IPv6 NDP Vlink direct routes need to be
imported to the dynamic routing protocols and advertised to the remote end.
As shown in
, Router D uses VLANIF interfaces to connect to Routers A, B, and C
at three sites. Router E only needs to communicate with Router B, but not with Router A and
Router C. You can configure Router D to advertise IPv6 NDP Vlink direct routes and configure
a route-policy on Router D to filter out routes to the network segment of the VLAN for which
the VLANIF interfaces are configured and filter out routes to Router A and Router C.
HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
1 IP Routing Basic Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
49