HP Fabric Clustering System HP-UX Administrator's Guide, March 2008

Table B-39 auto-negotiate Syntax Description
DescriptionSyntax
Enter the IP address of the target host.ip
Refers to the Global ID of the host HCA.gid
Refers to the GID extensionext
Refers to the Queue-Pair number of the host.qpn
identifies the chassis port being accessed by the target host.port#/slot#
Command Modes: Global-configuration mode.
Privilege Level: InfiniBand read-write user.
Usage Guidelines: The system supports dynamic ARP, so any IP host connected to an IB
interface port may see or detect all the other connected IPoIB and IP hosts. Connected IPoIB hosts
are automatically detected by the subnet manager, queried for their network information, and
their information is added to the system routing table. The routing table associates an IP address
with a host GID (Global ID).
Static ARP addresses are assigned to InfiniBand interface ports to ensure these ports connect to
the correct network hosts.
An ARP table contains the currently available ARP records in the gateway. An ARP record may
be dynamically learned or statically created. For the most part, you may rely upon dynamic ARP
addressing. Dynamic ARP records may be deleted from the table after a period of time or updated
if a host address-change is detected (some gateway functions are not supported by HP InfiniBand).
Examples:
HP-IB(config)# arp ib 10.2.0.50 gid fe:80:00:00:00:00:00:00:00:05:ad:00:00:00:16:97 qpn 2 115/0
Defaults: This command has no defaults.
clear ib arp-cache
Synopsis: The clear ib arp-cache command removes accumulated IPoIB addresses from
the ARP routing table.
Syntax: clear ib arp-cache
Command Modes: Privileged-execute mode.
Privilege Level: InfiniBand read-write user.
Usage Guidelines: Under what circumstances might you want to do this?
Examples:
HP-IB# clear ib arp-cache
HP-IB#
Defaults: This command has no defaults.
Related Commands: “arp ib” (page 177)
default ip ip-over-ib-mtu
Synopsis: The default ip ip-over-ib-mtu command resets the maximum size of the
payload of IP-over-IB traffic back to the default size.
Syntax: default ip ip-over-ib-mtu
Command Modes: Global-configuration mode.
Privilege Level: Ethernet and InfiniBand read-write users.
Usage Guidelines: The maximum transmission unit is described in terms of payload size. TCP
uses the MTU to determine the maximum payload allowed for every transmission. Too great a
value can overwhelm routers and result in data retransmission. Too small a value results in
178 Switch Command Line Interface