Managing failover between information handling systems
Managing failover between information handling systems, including receiving, at an interface of a smart network interface card (smartNIC) of a primary information handling system, a packet, the primary information handling system communicatively couped to a secondary information handling system; determining whether the packet was transmitted by a network interface card (NIC) of the secondary information handling system; determining that the packet was transmitted by the NIC of the secondary information handling system, and in response, determining whether the packet is an address resolution protocol (ARP) request; determining that the packet is an ARP request, and in response, cloning a medium access control (MAC) address of the NIC of the secondary information handling system at the smartNIC of the primary information handling system; and forwarding the ARP request to a uplink connection.
1. A computer-implemented method of managing failover between information handling systems, the method comprising:
receiving, at an interface of a smart network interface card (smartNIC) of a primary information handling system, a packet, the primary information handling system communicatively coupled to a secondary information handling system, the smartNIC associated with a first power domain separate than a second power domain of a central processing unit (CPU) of the primary information handling system;
determining whether the packet was transmitted by a network interface card (NIC) of the secondary information handling system;
determining that the packet was transmitted by the NIC of the secondary information handling system, and in response, determining whether the packet is an address resolution protocol (ARP) request;
determining that the packet is an ARP request, and in response, cloning a medium access control (MAC) address of the NIC of the secondary information handling system at the smartNIC of the primary information handling system, including:
adjusting a power state of the secondary information handling system and a first power state of the first power domain of the smartNIC to an on-power state to clone the MAC address of the NIC of the secondary information handling system prior to adjusting a power state of the second power domain of the primary information handling system to an on-power state; and
forwarding the ARP request to a uplink connection.
2. The computer-implemented method of claim 1 , further comprising:
determining that the packet was not transmitted by the NIC of the secondary information handling system, and in response, determining whether the packet was received from the uplink connection;
determining that the packet was received from the uplink connection, and in response, determining whether the packet is an ARP request; and
determining that the packet is an ARP request, and in response, creating a gratuitous ARP from the ARP request and transmitting the gratuitous ARP to the secondary information handling system.
3. The computer-implemented method of claim 2 , further comprising:
in response to determining that the packet is an ARP request, forwarding the ARP request to a central processing unit (CPU) of the primary information handling system.
4. The computer-implemented method of claim 2 , further comprising:
determining that the packet was not received from the uplink connection, and in response, forwarding the packet to the uplink connection.
5. The computer-implemented method of claim 2 , further comprising:
determining that the packet is not an ARP request, and in response, determining whether the packet is an ARP response; and
determining that the packet is not an ARP response, and in response, forwarding the packet to a central processing unit (CPU) of the primary information handling system.
6. The computer-implemented method of claim 5 , further comprising:
determining that the packet is an ARP request, and in response, clone the packet and transmit to the NIC of the secondary information handling system; and
forwarding the ARP response to the CPU of the primary information handling system.
7. The computer-implemented method of claim 1 , further comprising:
determining that the packet is not an ARP request, and in response, determining whether the secondary information handling system is active and the primary information handling system is an off-power state; and
determining that the secondary information handling system is active and the primary information handling system is an off-power state, and in response, forwarding the packet to the uplink connection.
8. The computer-implemented method of claim 1 , further comprising:
receiving, at the smartNIC of the primary information handling system, an additional packet;
determining that the primary information system is in a power-off state; and
in response to determining that the primary information handling system is in the power-off state, forward the additional packet to the NIC of the secondary information handling system.
9. An information handling system comprising a processor having access to memory media storing instructions executable by the processor to perform operations, comprising:
receiving, at an interface of a smart network interface card (smartNIC) of a primary information handling system, a packet, the primary information handling system communicatively coupled to a secondary information handling system, the smartNIC associated with a first power domain separate than a second power domain of a central processing unit (CPU) of the primary information handling system;
determining whether the packet was transmitted by a network interface card (NIC) of the secondary information handling system;
determining that the packet was transmitted by the NIC of the secondary information handling system, and in response, determining whether the packet is an address resolution protocol (ARP) request;
determining that the packet is an ARP request, and in response, cloning a medium access control (MAC) address of the NIC of the secondary information handling system at the smartNIC of the primary information handling system, including:
adjusting a power state of the secondary information handling system and a first power state of the first power domain of the smartNIC to an on-power state to clone the MAC address of the NIC of the secondary information handling system prior to adjusting a power state of the second power domain of the primary information handling system to an on-power state; and
forwarding the ARP request to a uplink connection.
10. The information handling system of claim 9 , the operations further comprising:
determining that the packet was not transmitted by the NIC of the secondary information handling system, and in response, determining whether the packet was received from the uplink connection;
determining that the packet was received from the uplink connection, and in response, determining whether the packet is an ARP request;
determining that the packet is an ARP request, and in response, creating a gratuitous ARP from the ARP request and transmitting the gratuitous ARP to the secondary information handling system.
11. The information handling system of claim 10 , the operations further comprising:
in response to determining that the packet is an ARP request, forwarding the ARP request to a central processing unit (CPU) of the primary information handling system.
12. The information handling system of claim 10 , the operations further comprising:
determining that the packet was not received from the uplink connection, and in response, forwarding the packet to the uplink connection.
13. The information handling system of claim 10 , the operations further comprising:
determining that the packet is not an ARP request, and in response, determining whether the packet is an ARP response; and
determining that the packet is not an ARP response, and in response, forwarding the packet to a central processing unit (CPU) of the primary information handling system.
14. The information handling system of claim 13 , the operations further comprising:
determining that the packet is an ARP request, and in response, clone the packet and transmit to the NIC of the secondary information handling system; and
forwarding the ARP response to the CPU of the primary information handling system.
15. The information handling system of claim 9 , the operations further comprising:
determining that the packet is not an ARP request, and in response, determining whether the secondary information handling system is active and the primary information handling system is an off-power state; and
determining that the secondary information handling system is active and the primary information handling system is an off-power state, and in response, forwarding the packet to the uplink connection.
16. The information handling system of claim 9 , the operations further comprising:
receiving, at the smartNIC of the primary information handling system, an additional packet;
determining that the primary information system is in a power-off state; and
in response to determining that the primary information handling system is in the power-off state, forward the additional packet to the NIC of the secondary information handling system.
17. A non-transitory computer-readable medium storing software comprising instructions executable by one or more computers which, upon such execution, cause the one or more computers to perform operations comprising:
receiving, at an interface of a smart network interface card (smartNIC) of a primary information handling system, a packet, the primary information handling system communicatively couped to a secondary information handling system, the smartNIC associated with a first power domain separate than a second power domain of a central processing unit (CPU) of the primary information handling system;
determining whether the packet was transmitted by a network interface card (NIC) of the secondary information handling system;
determining that the packet was transmitted by the NIC of the secondary information handling system, and in response, determining whether the packet is an address resolution protocol (ARP) request;
determining that the packet is an ARP request, and in response, cloning a medium access control (MAC) address of the NIC of the secondary information handling system at the smartNIC of the primary information handling system, including:
adjusting a power state of the secondary information handling system and a first power state of the first power domain of the smartNIC to an on-power state to clone the MAC address of the NIC of the secondary information handling system prior to adjusting a power state of the second power domain of the primary information handling system to an on-power state; and
forwarding the ARP request to a uplink connection.