R21xx-HP FlexFabric 11900 High Availability Configuration Guide

18
Ste
p
Command Remarks
1. Enter system view. system-view N/A
2. (Optional.) Configure the
interval field value in the
CCM messages sent by MEPs.
cfd cc interval interval-value
service-instance instance-id
By default, the interval field value is
4.
3. Enter Layer 2 Ethernet
interface view, Layer 3
Ethernet interface view, or
Layer 2 aggregate interface
view.
interface interface-type
interface-number
Configurations in Ethernet
interface view take effect only on
the current interface;
configurations in aggregate
interface view take effect on the
aggregate interface and all its
member ports; configurations on a
member port take effect only when
the member port leaves the
aggregation group.
4. Enable CCM sending on a
MEP.
cfd cc service-instance instance-id
mep mep-id enable
By default, CCM sending on a
MEP is disabled.
Configuring LB on MEPs
The LB function can verify the link state between the local MEP and the remote MEP or MIP.
To configure LB on a MEP:
Task Command Remarks
Enable LB.
cfd loopback service-instance
instance-id mep mep-id
{ target-mac mac-address |
target-mep target-mep-id }
[ number number ]
By default, LB is disabled.
Available in any view.
Configuring LT on MEPs
LT can trace the path between source and target MEPs, and can locate link faults by automatically
sending LT messages. The two functions are implemented in the following way:
• To implement the first function, the source MEP first sends LTM messages to the target MEP. Based
on the LTR messages in response to the LTM messages, the path between the two MEPs is identified.
• In the latter case, after LT messages automatic sending is enabled, if the source MEP fails to receive
the CCM frames from the target MEP within 3.5 times the transmission interval, the link between the
two is considered faulty and LTM frames (with the target MEP as the destination and the TTL field in
the LTM frames set to the maximum value 255) will be sent out. Based on the LTRs that the MIPs return,
the fault source is located.
To configure LT on MEPs: