To create a mapping of Ethernet VLANs to secure fabric subnet tags (referred to as PKEYS in InfiniBand terminology) and transmit IPv4 packets between the Ethernet and InfiniBand networks, set up Proxy ARP logical interfaces on the InfiniBand-Ethernet gateway switch to act as bridges for forwarding IP over Ethernet (IPoE) packets to the IP over InfiniBand (IPoIB) interfaces, and IPoIB packets to the IPoE interfaces.

A Proxy ARP logical interface owns an IP address, VLAN tag, and InfiniBand PKEY value of the subnet it belongs to. (InfiniBand PKEYs are identified as subnet tags on the Fabric Manager user interface.) An InfiniBand-Ethernet gateway switch supports up to 32 Proxy ARP logical interfaces, and each interface must have a unique pairing of VLAN with subnet tag (PKEY).

Obtaining Secure Fabric Subnet Tags

Using the Fabric Manager user interface, add the desired secure fabrics, and then note down the subnet tag (PKEY) values for each secure fabric. For more information on adding secure fabrics, refer to .

Setting Up Proxy ARP Logical Interface

While in configuration mode, enable Proxy ARP, create a Proxy ARP interface, set up an IP address and network mask to the interface, add a VLAN and a subnet tag (PKEY) to the interface, and then enable the interface.

In the following example, the ip proxy-arp command is executed to enable Proxy ARP, and the logical interface Proxy-ARP 2 is created. The interface is set up with the IP address 172.31.100.1 and network mask 16, and then VLAN 10 and subnet tag (PKEY) 0x0001 are added. Finally, the interface is enabled.

Switch-1 [standalone: master] (config) # ip proxy-arp 
Switch-1 [standalone: master] (config) # interface proxy-arp 2
Switch-1 [standalone: master] (config interface proxy-arp 2) # ip address 172.10.100.1
Switch-1 [standalone: master] (config interface proxy-arp 2) # ip netmask /16
Switch-1 [standalone: master] (config interface proxy-arp 2) # ip vlan 10
Switch-1 [standalone: master] (config interface proxy-arp 2) # ip pkey 0x0001
Switch-1 [standalone: master] (config interface proxy-arp 2) # no shutdown
Switch-1 [standalone: master] (config interface proxy-arp 2) # exit

Repeat as needed to create enough Proxy ARP logical interfaces to map all Ethernet VLANs to secure fabric subnet tags.

Verifying Proxy ARP Logical Interface Setup

After creating all desired Proxy ARP logical interfaces and mapping all Ethernet VLANs to secure fabric subnet tags, execute the show interfaces proxy-arp brief command to verify that the interfaces are set up as expect. For example,

Switch-1 [standalone: master] (config) # show interfaces proxy-arp brief
Interface    Description   State   Bridged interfaces
---------------------------------------------------------
proxy-arp 1  N/A           Up      vlan 1, pkey 0x7fff
proxy-arp 2  N/A           Up      vlan 10, pkey 0x1
proxy-arp 3  N/A           Up      vlan 4000, pkey 0xfa0