1-6
Route Recursion
The nexthops of some BGP routes (except eBGP routes) and static routes configured with nexthops
may not be directly connected. To forward the packets, the outgoing interface to reach the nexthop must
be available. Route recursion is used to find the outgoing interface based on the nexthop information of
the route. Link-state routing protocols, such as OSPF and IS-IS, do not need route recursion because
they obtain nexthop information through route calculation.
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
IP Routing Volume
.
Configuring a Router ID
Some routing protocols use a router ID to identify a device. You can configure a global router ID for a
device. If no router ID is configured for a protocol, the global router ID is used.
To do…
Use the command…
Remarks
Enter system view
system-view
—
Configure a router ID
router id router-id
Optional
Not configured by default.
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
]
Available in any view
Display information about
routes to the specified
destination
display ip routing-table
ip-address
[
mask-length | mask
]
[
longer-match
] [
verbose
]
Available in any view
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
]
Available in any view
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
]
Available in any view
Display routes of a routing
protocol
display ip routing-table
protocol
protocol
[
inactive
|
verbose
]
Available in any view
Summary of Contents for S7902E
Page 82: ...1 4 DeviceA interface tunnel 1 DeviceA Tunnel1 service loopback group 1 ...
Page 200: ...1 11 DeviceB display vlan dynamic No dynamic vlans exist ...
Page 598: ...ii ...
Page 1757: ...4 9 ...
Page 1770: ...6 4 ...
Page 2017: ...2 11 Figure 2 3 SFTP client interface ...
Page 2238: ...1 16 DeviceA cfd linktrace service instance 1 mep 1001 target mep 4002 ...
