Remote-box status types

Article Id: 167881
Status: Published
Updated On: 13-05-2017 10:56
Legacy Id: TECH243959
Products:
XOS
Issue/Introduction:

The status of the connection to a remote box can be either Active, Standby, Secondary or Down. This article illustrates a simple remote-box configuration together with examples of the "show remote-box" output on XOS 9.6.x.n/a

Cause:

Each chassis in a DBHA or multi-box HA setup requires a configured remote-box system. The examples below show a simple scenario with two chassis in DBHA where each chassis runs with a single CPM in slot 14. The IP addresses specified in the remote-box statement point to the internal IP address and the management interface IP address of the remote CPM, also in slot 14 of the respective chassis:
 
Remote box configuration on primary chassis CBS100:
 
system-identifier 100
system-internal-network 1.1.0.0/16
remote-box 200 1.1.200.20 192.168.1.200
 
Remote box configuration on secondary chassis CBS200:
 
system-identifier 200
system-internal-network 1.1.0.0/16
remote-box 100 1.1.100.20 192.168.1.100

The Active remote-box connection is established via the HA port if everything works properly. The HA port connects the two chassis via the system internal network. The  management interface 14/1 is used as Standby connection. The Standby connection is ready to take over if the current Active link is disconnected. Here is the expected remote-box status during normal operation on each chassis. The output doesn't include status Secondary since it only applies for setups with dual CPM configuration. The Status values appear in different colors for better clarity. 

CBS100# show remote-box
Local System ID: 100

Remote System ID: 200
Remote IP       Local Intf  Local IP        Status  Time In State  Link Qual  
1.1.200.20      HA port     1.1.100.20      Active  0 days, 01:19  100
192.168.1.200   14/1        192.168.1.100   Standby 0 days, 01:19  100
(2 rows)
 
CBS200# show remote-box
Local System ID: 200

Remote System ID: 100
Remote IP       Local Intf  Local IP        Status  Time In State  Link Qual
1.1.100.20      HA port     1.1.200.20      Active  0 days, 01:19  100
192.168.1.100   14/1        192.168.1.200   Standby 0 days, 01:19  100
(2 rows)
 

If the HA port is unplugged (link down), the original Standby connection via the CPM management link changes status to Active and the connection via HA link is reported Down:
 
CBS100# show remote-box
Local System ID: 100

Remote System ID: 200
Remote IP       Local Intf  Local IP        Status  Time In State  Link Qual
1.1.200.20      HA port     1.1.100.20      Down    0 days, 00:00  0
192.168.1.200   14/1        192.168.1.100   Active  0 days, 00:00  100
(2 rows)
 
CBS200# show remote-box
Local System ID: 200

Remote System ID: 100
Remote IP       Local Intf  Local IP        Status  Time In State  Link Qual
1.1.100.20      HA port     1.1.200.20      Down    0 days, 00:01  0
192.168.1.100   14/1        192.168.1.200   Active  0 days, 00:01  100
(2 rows)