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Assigned
Slave Nodes
Priority
Master 1
1 (primary)
Master 2
2
Master 3
3
Master 4
4
Copyright © 2018, Juniper Networks, Inc.
The LED becomes red when NetRef is in Wait or Aggressive state. The LED is green when
NetRef is in Maintain state. The switching of the masters occurs as described in the
following table:
Assigned Priority
After First Failure
4
1 (primary)
2
3
If all the four master nodes goes down, the NetRef state remains in Starvation state and
no switching will take place. When the NetRef state of the slave node is Maintain and
the primary master goes down, the slave node is unable to receive the packets within
the last 20 seconds. Therefore, the NetRef state of the slave node moves from Maintain
state to Starvation state and switching takes place. When the NetRef state of the slave
node is Aggressive and the primary master goes down, the slave node is unable to receive
the packets within the last 20 seconds. Therefore, the NetRef state of the slave node
transitions from Aggressive state to Starvation state and switching will take place.
When the NetRef state of the slave node is in Wait state (waiting for NetRef packets
from the primary master node) and the primary master node is disabled but the secondary
master nodes are sending NetRef packets to the slave node, switching will take place.
Revert option is not supported; when the primary node comes up, the slave node remains
locked to the secondary master node and does not become locked to the primary master
node.
Without multiple master nodes support, when a node is configured as slave, the node
www_db string is
"23;1;0;0;0;0;0;0;0;0;0;5;1;5;1;5;1;5;1;5;1;;2|64|127 . 0 . 0 . 1 /127 . 0 . 0 . 1 /127 . 0 . 0 . 1 /127 . 0 . 0 . 1 /127 . 0 . 0 . 1 /127 . 0 . 0 . 1 /127 . 0 . 0 . 1 /127 . 0 . 0 . 1 /127 . 0 . 0 . 1 /|0|255|;0;"
This www_db string is not different when multiple master nodes are configured for a
backup node. The first IP address in the www_db string contains a priority of 1, the second
contains a priority of 2, and so on, as shown as follows:
" 2 3 ; 1 ; 0 ; 0 ; 0 ; 0 ; 0 ; 0 ; 0 ; 0 ; 0 ; 5 ; 1 ; 5 ; 1 ; 5 ; 1 ; 5 ; 1 ; 5 ; 1 ; ; 2 | 6 4 | 1 0 . 2 1 6 . 1 1 8 . 7 3 /1 0 . 2 1 6 . 1 1 8 . 8 6 /1 0 . 2 1 6 . 1 1 8 . 9 0 /1 0 . 2 1 6 . 1 1 8 . 8 8 /1 2 7 . 0 . 0 . 1 /1 2 7 . 0 . 0 . 1 /1 2 7 . 0 . 0 . 1 /1 2 7 . 0 . 0 . 1 /1 2 7 . 0 . 0 . 1 / | 0 | 2 5 5 | ; 0 ; "
When node is configured as master, the node www_db string will remain same as it is there
in the earlier releases.
Assigned Priority
After Second
Assigned Priority
Failure
After Third Failure
3
2
4
3
1 (primary)
4
1 (primary)
Chapter 2: Configuring CTP Bundles
Assigned Priority
After Fourth
Failure
1 (primary)
2
3
4
123
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