Configuring IP-Link Using the CLI

This section describes how to configure IP-link.

Context

IP-link, automatic service link reachability detection, detects the status of the links indirectly connected to the FW to ensure service continuity.

Procedure

Access the system view.
system-view
Enable the IP-link check function.
ip-link check enable
Set up an IP-link and access the IP-link view.
ip-link name ip-link-name [ vpn-instance vpn-instance-name ]
Set a destination IP address or domain name to be monitored by IP-link.
# Monitor the IPv4 address or domain name.

destination { ipv4-address | domain-name } [ interface interface-type interface-number ] [ mode { icmp [ next-hop { nexthop-ipv4-address | dhcp | dialer } ] | arp } ]

# Monitor the IPv6 address or domain name.

ipv6 destination { ipv6-address | domain-name } [ interface interface-type interface-number ] [ mode { icmp6 [ next-hop nexthop-ipv6-address ] | ns } ]
Optional: Configure the source address for IP-link.
source-ip
Optional: Configure the IP-link detection interval.
tx-interval interval
Optional: Configure the maximum number of IP-link detection timeout failures.
times times

The FW sends a detection packet every interval seconds. If the FW does not receive any response packet after sending times packets, the FW considers the detected link to be faulty.
Optional: Configure the minimum number of UP members affecting IP-link status.
least active-linknumber link-number

The minimum number of UP members affecting IP-link status needs to be configured when IP-link is used to detect multiple destination addresses or domain names. If the actual number of detected destination addresses or domain names is lower than the minimum number, the IP-link becomes down.

Follow-up Procedure

Run the display ip-link verbose command to view the detailed information about IP-link.

<sysname> display ip-link verbose                                    
Current Total Ip-link Number : 1                                                
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 Name                                         : test                            
 Index                                        : 2                               
 Enable Flag                                  : 1                               
 Vrf                                          : public/0                        
 Member Number                                : 2                               
 Tx-interval (default is 5)                   : 5                               
 Times (default is 3)                         : 3                               
 Least active-linknumber (default is 1)       : 1                               
 State                                        : up                            
 Init State Number                            : 0                               
 DOWN State Number                            : 0                               
 UP State Number                              : 2                               
 -------------------------------------------------------------------------------
  State                                      : up                             
  Destination Type/Destination Info          : IP/1.1.1.1                       
  Protocol/Port                              : icmp/0                           
  Healthcheck detect index                   : 8                                
  State                                      : up                             
  Destination Type/Destination Info          : IP/2.2.2.2                      
  Protocol/Port                              : icmp/0                           
  Out If Index                               : GigabitEthernet0/0/1  
  Healthcheck detect index                   : 9                                
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