Cisco InfiniBand 4x User's Guide download pdf (Page 62)

48 Implementing Cisco InfiniBand on IBM BladeCenter

7. Verify your connection works by pinging another device on the same subnet as shown in

Figure 4-13.

Figure 4-13 Successful ping

We have now created a virtual network interface on the Linux host that now will send Ethernet

traffic over our InfiniBand network.

4.1.3 QLogic InfiniServ Driver: Configuring IPoIB

In this section, we describe how to configure a network interface on a Linux blade using the

QLogic InfiniServ drivers that will send IP traffic of the InfiniBand interfaces of the HCA.

Because this method uses the InfiniBand ports on the HCA, you are limited by the number of

HCA ports on the expansion card (two in this case). Because the IP traffic is over the

InfiniBand interfaces and not translated into true Ethernet traffic, the Ethernet bridge is not

needed. However without the bridge module, you cannot ping a true Ethernet device—just

another InfiniBand interface running IP over InfiniBand.

To create IPoIB interfaces on a Linux blade server, complete these steps:

1. Get the InfiniBand Globally Unique ID (GUID) of the HCA port that you want to use with

the p1info command. This command shows you the unique identifier and status

information for port 1 of the HCA. See Figure 4-14.

Figure 4-14 InfiniBand HCA port 1 information

[root@localhost network-scripts]# ping 192.168.199.254

PING 192.168.199.254 (192.168.199.254) 56(84) bytes of data.

64 bytes from 192.168.199.254: icmp_seq=1 ttl=255 time=0.292 ms

64 bytes from 192.168.199.254: icmp_seq=2 ttl=255 time=0.299 ms

64 bytes from 192.168.199.254: icmp_seq=3 ttl=255 time=0.302 ms

64 bytes from 192.168.199.254: icmp_seq=4 ttl=255 time=0.329 ms

--- 192.168.199.254 ping statistics ---

5 packets transmitted, 4 received, 20% packet loss, time 4001ms

rtt min/avg/max/mdev = 0.292/0.305/0.329/0.022 ms, pipe 2

[root@localhost InfiniServBasic.4.1.0.6.3]# p1info

Port 1 Info

PortState: Active PhysState: LinkUp DownDefault: Polling

LID: 0x0008 LMC: 0

Subnet: 0xfe80000000000000 GUID: 0x0005ad00000508fd

SMLID: 0x0027 SMSL: 0 RespTimeout : 33 ms SubnetTimeout: 1048 us

M_KEY: 0x0000000000000000 Lease: 15 s Protect: Readonly

MTU: Active: 2048 Supported: 2048 VL Stall: 0

LinkWidth: Active: 4x Supported: 4x Enabled: 4x

LinkSpeed: Active: 2.5Gb Supported: 2.5Gb Enabled: 2.5Gb

VLs: Active: 4+1 Supported: 4+1 HOQLife: 4096 ns

Capability 0x02010048: CR CM SL Trap

Violations: M_Key: 0 P_Key: 0 Q_Key: 0

ErrorLimits: Overrun: 0 LocalPhys: 15 DiagCode: 0x0000

P_Key Enforcement: In: Off Out: Off FilterRaw: In: Off Out: Off

[root@localhost InfiniServBasic.4.1.0.6.3]#

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