Checking The Configurations - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
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8.4.8 Checking the Configurations

After BGP route attributes are configured, you can view information about these route attributes.
Prerequisites
The BGP route attribute configuration is complete.
Procedure
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Issue 02 (2014-09-30)

1.

Run:
system-view
The system view is displayed.
2. Run:
bgp { as-number-plain | as-number-dot }
The BGP view is displayed.
3. Run:
undo check-first-as
The BGP device is prevented from checking the first AS number contained in the
AS_Path attribute of an Update message received from an EBGP peer.
By default, a BGP device checks whether the first AS number contained in the
AS_Path attribute of an Update message received from an EBGP peer is the same as
the number of the AS where the EBGP peer resides. If the numbers are not the same,
the BGP device discards the Update message and closes the EBGP connection with
the EBGP peer.
NOTICE
Exercise caution when running the undo check-first-as command, because use of this
command increases the possibility of routing loops.
After the configuration is complete, run the refresh bgp command if you want to
check the received routes again.
Run the display bgp paths [ as-regular-expression ] command to check information about
AS_Path attributes of routes.
Run the display bgp routing-table different-origin-as command to check information
about routes that have the same destination address but different source AS numbers.
Run the display bgp routing-table regular-expression as-regular-expression command
to check information about routes matching a specified regular expression.
Run the display bgp routing-table [ network [ { mask | mask-length } [ longer-
prefixes ] ] ] command to check routing information in a BGP routing table.
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8 BGP Configuration
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