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Geographical Redundancy High Availability (GRHA)

HA Network Requirements

The following are the network requirement for Geographical Redundancy High Availability (GRHA) mode:

• 10G/1G bandwidth for direct and not direct cable connections.
• The network connecting to the SBCs must support ARP monitoring.

Spacevars
0 series5

platforms are configurable using a CLI action command to support Geographical Redundancy High Availability (GRHA) mode providing enhanced support against network degradation. GRHA mode supports active and standby servers located in two different data-centers. This is performed by changing the bond device monitoring from MII to ARP. ARP monitoring is used to detect issues when SBCs are connected to switches, which are connected to each other through a network. GRHA mode protects against data center and network failures. In addition to switching the bond monitoring, a new leadership algorithm is included which changes the decision on which SBC survives split-brain recovery. The change is introduced in a GRHA situation since any HA link loss is primarily due to data center isolation.

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Note
icon false title Note
All Nodes must use the same algorithm. The default algorithm is used until new peer election algorithm is configured and available on both the nodes.

HA Network Requirements

The following are the network requirement for GRHA mode:

• 10G/1G bandwidth for direct and not direct cable connections.
• The network connecting to the SBCs must support ARP monitoring.

HA Link Delays per HA Pair

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