Operation Manual – Routing Overview
H3C S3610&S5510 Series Ethernet Switches
Chapter 1 IP Routing Overview
1-6
II. Route backup
Route backup can help improve network reliability. With route backup, you can
configure multiple routes to the same destination, expecting the one with the highest
priority to be the main route and all the rest backup routes.
Under normal circumstances, packets are forwarded through the main route. When the
main route goes down, the route with the highest priority among the backup routes is
selected to forward packets. When the main route recovers, the route selection process
is performed again and the main route is selected again to forward packets.
1.2.5 Sharing of Routing Information
As different routing protocols use different routing algorithms to calculate routes, they
may find different routes. In a large network with multiple routing protocols, it is required
for routing protocols to share their routing information. Each routing protocol has its
own route redistribution mechanism. For detailed information, refer to the description
about route redistribution in each routing protocol.
1.3 Displaying and Maintaining a Routing Table
To do…
Use the command…
Remarks
Display brief
information about the
active routes in the
routing table
display ip routing-table
[
vpn-instance vpn-instance-name
]
[
verbose
|
|
{
begin | exclude |
include
}
regular-expression
]
Display information
about routes to the
specified destination
display ip routing-table
ip-address
[
mask-length | mask
] [
longer-match
]
[
verbose
]
Display information
about routes with
destination addresses
in the specified range
display ip routing-table
ip-address1
{
mask-length | mask
}
ip-address2
{
mask-length | mask
} [
verbose
]
Display information
about routes permitted
by an IPv4 basic ACL
display ip routing-table acl
acl-number
[
verbose
]
Available in
any view
Display routing
information permitted
by an IPv4 prefix list
display ip routing-table ip-prefix
ip-prefix-name
[
verbose
]
Display routes of a
routing protocol
display ip routing-table
protocol
protocol
[
inactive
|
verbose
]
Display statistics about
the network routing
table or a VPN routing
table
display ip routing-table
[
vpn-instance
vpn-instance-name
]
statistics
Available in
any view
