How long is the OLT failover time?

Hi there!

It seems like you are using dual homing protect.

Thanks Gavin, sorry, I made mistake, it should be active-standby mode. Two OLT same configuration, but PON ports are active on OLT 1 and PON ports on OLT 2 are inactive. So when OLT 2 detects OLT1 inactive, then OLT 2 PON ports will become active and forward the traffic. This will take how long time if OLT 1 uplinks disconnected, but PON ports are still on. Please advise, thanks

This will take how long time if OLT 1 uplinks disconnected, but PON ports are still on ------- this will not trigger the switch over .

if need uplink  port status associate to the protect group , you can configure other detect protocol , such as BFD, or MEP .

Run the uplink-monitor port command to associate the protection groups with the uplink Ethernet port status.

• Run the uplink-monitor bfd command to associate the protection groups with a BFD session. For instructions about how to configure a BFD session, see Configuring a BFD Session.
• Run the uplink-monitor mep command to associate the protection groups with an MEP session. For instructions about how to configure an MEP session, see Configuring CFM.

 

   Following  below  step configure BFD session :

         http://support.huawei.com/hedex/hdx.do?docid=EDOC1100018501&id=cfg_cli_3110&text=Configuring%252520the%252520BFD&lang=en

         or reference  below link configure MEP

         http://support.huawei.com/hedex/hdx.do?docid=DOC1100334186&id=cfg_cli_0619&text=Configuring%252520the%252520Ethernet%252520CFM%252520OAM&lang=en

 

 

Thanks Gavin. If use uplink monitor bfd, how long the fail over time? Another question,if just PON port on OLT 1 down, how does OLT 2 knows and activate its own PON ports to forward the traffic?

If use uplink monitor bfd, how long the fail over time?
 
BFD detetion time can be changed as your requirement :
 
Modify the detection time.

• Run the min-tx-interval command to configure the interval for sending BFD packets.
• Run the min-rx-interval command to configure the interval for receiving BFD packets
  

 
 
Another question,if just PON port on OLT 1 down, how does OLT 2 knows and activate its own PON ports to forward the traffic?
 
--- in dual homing configuration defined the dual homing devices (for example ):
 
huawei_A(config)#dual-parenting local-node ip-address 192.168.68.1 port 6076 key work_4234
huawei_A(config)#dual-parenting peer-node standby ip-address 192.168.68.8 port 6076 key protect_4234
huawei_A(config)#dual-parenting sync enable

 

 

huawei_B(config)#dual-parenting local-node ip-address 192.168.68.8 port 6076 key protect_4234
huawei_B(config)#dual-parenting peer-node active ip-address 192.168.68.1 port 6076 key work_4234
huawei_B(config)#dual-parenting sync enable
 
----and in the protect group defined the protect target(for example ,TYPE B protect group configuration in 2 OLT) :
huawei_A(config)#protect-group 1 protect-target gpon-uni-port workmode dual-parenting
huawei_A(protect-group-1)#protect-group member port 0/2/1 role work
huawei_A(protect-group-1)#peer-group-member peer-node standby peer-port 0/2/1
huawei_A(protect-group-1)#uplink-monitor port 0/19/1
huawei_A(protect-group-1)#quit

 
huawei_B(config)#protect-group 1 protect-target gpon-uni-port workmode dual-parenting
huawei_B(protect-group-1)#protect-group member port 0/2/1 role protect
huawei_B(protect-group-1)#peer-group-member peer-node active peer-port 0/2/1
huawei_B(protect-group-1)#protect-group enable
huawei_B(protect-group-1)#uplink-monitor port 0/19/1
huawei_B(protect-group-1)#quit

 

--- and your terminal (ONT) need support type B or type C protect

Thanks Gavin. These commands are configured on ONT or OLT? How OLTs communicate with each other or monitor each
other? Via core switches because both OLT connected to core switches?

yes , configured in OLT ,you can reference below design :
https://support.huawei.com/enterprise/en/doc/EDOC1100016413?section=j014

and need your Layer 3 switch support cluster and layer 2 isolation.

Thanks Gavin. If not configure layer 2 isolation on core switch, what will happen? can you please explain about the layer 2
isolation for what purpose?

If not configure layer 2 isolation on core switch , the ONT MAC address of OLT A will learned by OLT B uplink port，
for OLT uplink port MAC priority higher than user side ，when switch over happened， before the uplink port MAC aging ， the ONT in OLT B cannot send packets to switch ...