OpenContrail various next hop contrail vrouter agent uses
https://github.com/Juniper/contrail-controller/wiki/Contrail-Vrouter-Agent---Introspect
Below is a brief description about various next-hop contrail vrouter agent uses.
1)
Interface next-hop: Destination VM is reachable locally on the compute node, tap interface on which packet has to sent for given destination address is also printed along with this next hop.
2)
Tunnel next-hop: Destination address is reachable on a remote compute node, hence packet would be encapsulated and sent to remote compute node where given destination VM is present
3)
Resolve next-hop: Destination route pointing such a nexthop, would result in ARP. For example lets assume IP address of compute node is 1.1.1.1/24, then a route 1.1.1.0/24 would be added pointing to a resolve NH, and any packet hitting this route would result in ARP.
4)
Receive next-hop: Destination route pointing to such a next-hop would be consumed by host. If compute node IP address is 1.1.1.1/24, then a 1.1.1.1/32 route would installed pointing to receive NH, and so that packets would be accepted and processed by host.
5)
Composite next-hop: Usually mulicast route points to such a next-hop, composite next hop would in turn consist of multiple tunnel and interface next hop to which packet would be replicated to.
https://github.com/Juniper/contrail-controller/wiki/Contrail-Vrouter-Agent---Introspect
Below is a brief description about various next-hop contrail vrouter agent uses.
1)
Interface next-hop: Destination VM is reachable locally on the compute node, tap interface on which packet has to sent for given destination address is also printed along with this next hop.
2)
Tunnel next-hop: Destination address is reachable on a remote compute node, hence packet would be encapsulated and sent to remote compute node where given destination VM is present
3)
Resolve next-hop: Destination route pointing such a nexthop, would result in ARP. For example lets assume IP address of compute node is 1.1.1.1/24, then a route 1.1.1.0/24 would be added pointing to a resolve NH, and any packet hitting this route would result in ARP.
4)
Receive next-hop: Destination route pointing to such a next-hop would be consumed by host. If compute node IP address is 1.1.1.1/24, then a 1.1.1.1/32 route would installed pointing to receive NH, and so that packets would be accepted and processed by host.
5)
Composite next-hop: Usually mulicast route points to such a next-hop, composite next hop would in turn consist of multiple tunnel and interface next hop to which packet would be replicated to.
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