Product Documentation

Link State Propagation

Aug 09, 2017

Link  State  Propagation  feature  allows  network  administrators  to keep the  link  state  of  a  bypass  pair  synchronized  allowing  attached  devices  on  the other  side  of  the  link  to  view  when  links are inactive.  When  one  port  of  a  bypass  pair becomes inactive,  the  coupled  link is  de-activated administratively.  If  your  network  architecture  includes  a  parallel  failover network,  this  forces  traffic  to  transition  to  that  network.  Once the disrupted link is restored, its corresponding link will automatically become active.    

To configure Link State Propagation:

     1.  Navigate  to  Configuration  Editor  →  Sites   →  [Site  Name]  →  Interface  Groups

     2.  Expand Virtual Interfaces and under Bridge Pairs, click  the  LSP checkbox  to  enable  Link State  Propagation  for  a  Bridge  Pair.  Click Apply to save the settings.  

To monitor Link statistics:

     1.  In the Monitor  →  Statistics page, choose  Ethernet  from  the  Show  drop-down  menu  to  view  the  status  of  the bypass  port  pair  with  Link  State  Propagation  enabled.  Observe that the LAN side link is down and subsequently the WAN side link of the bypass pair is administratively DISABLED.  

localized image

     2  Navigate to Configuration→  Appliance Settings →   Network Adapters → Ethernet tab. The ports  that  are  administratively  down  are  indicated by  a  red  asterisk  (*)  in  the  Ethernet  Interface  Settings  list.    

localized image