![Huawei Quidway NetEngine40E Configuration Manual - Reliability Download Page 346](http://html.mh-extra.com/html/huawei/quidway-netengine40e/quidway-netengine40e_configuration-manual-reliability_169453346.webp)
Procedure
Step 1
Run:
system-view
The system view is displayed.
Step 2
Run:
acl
[
number
]
acl-number1
[
match-order
{
auto
|
config
} ]
The ACL view is displayed.
Step 3
Run:
rule
[
rule-id
] {
deny
|
permit
} [
fragment-type
fragment-type-name
|
source
{
source-ip-address source-wildcard
|
any
} |
time-range
time-name
|
vpn-instance
vpn-instance-name
]
*
An ACL rule is configured.
Step 4
Run:
quit
Return to the system view.
Step 5
Run:
bfd
The BFD view is displayed.
Step 6
Run:
echo-passive
{
all
|
acl
basic-acl-number
}
The BFD passive Echo function is enabled.
l
all
: enables the passive Echo function of all the BFD sessions.
l
To enable the passive Echo function for a BFD session that matches the configured ACL
rule, specify the
acl
parameter. When you configure an ACL rule, specify the
permit
parameter for both the local and remote devices' source addresses. You can enable the passive
Echo function for BFD control packets that match the permit action and disable the passive
Echo function for BFD control packets that match the deny action or do not match any ACL
rules.
NOTE
If an ACL rule is created or changed after a BFD session goes Up through negotiations, this ACL rule can
take effect only after the BFD session goes Down and then Up or the parameters of the BFD session are
changed.
----End
5.3.3 Checking the Configurations
By viewing the status, type, and Echo function status of a BFD session, you can check whether
the configurations are successful.
Prerequisites
The configurations of the BFD passive echo function are complete.
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
5 BFD Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
329