Administrator Guide

As BGP does not query next-hop information corresponding to locally originated routes, a local route with an
unreachable next-hop is chosen as the best route.
When a combination of locally originated and peer originated routes occurs, both these routes will exist in the
RTM. However, only the best route is kept active in the RTM and the remaining route is rendered in-active.
It is possible to keep only one locally originated route in the BGP database. Network command has preference
over the re-distributed routes. When the locally originated route is no longer present in the database the other
route is automatically installed.
In BGP, the next-hop for the route is calculated from the information that is acquired through IGP or static routes.
Related
Commands
redistribute — redistributes routes into BGP.
network backdoor
Specify this IGP route as the preferred route.
C9000 Series
Syntax
network ip-address mask backdoor
To remove a network, use the no network ip-address mask backdoor command.
Parameters
ip-address Enter an IP address in dotted decimal format of the network.
mask
Enter the mask of the IP address in the slash prefix length format (for example, /24).
The mask appears in command outputs in dotted decimal format (A.B.C.D).
Defaults Not configured.
Command Modes ROUTER BGP
Command History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
7.8.1.0 Introduced on the S-Series.
7.7.1.0 Introduced on the C-Series.
Usage Information Although the system does not generate a route due to the backdoor config, there is an option for injecting/
sourcing a local route in the presence of network backdoor config on a learned route.
permit bandwidth
Specify link bandwidth extended-community attribute as the matching criteria to permit incoming or outgoing traffic.
Syntax
permit bandwidth
To disable this setting, enter the no permit bandwidth command.
372 Border Gateway Protocol