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86 Implementing Cisco InfiniBand on IBM BladeCenter
5.1.3 Configuring IP over InfiniBand
The IPoIB protocol passes IP traffic over the InfiniBand network. Configuring IPoIB is very
similar to configuring IP on the Ethernet interfaces. The procedure for configuring IPoIB using
the Cisco SRP drivers is also the same, but not specifically shown in this chapter.
To configure IPoIB, you assign an IP address and subnet mask to each InfiniBand port on the
host. IPoIB automatically adds InfiniBand interface names to the IP network configuration. To
configure IPoIB, perform the following steps:
1. From the command prompt, assign the IP address and subnet mask as shown in
Example 5-3.
Example 5-3 Command to directly place an IP address on the IB interface
host1# ifconfig ib0 172.16.240.10 netmask 255.255.255.0
2. The IPoIB configuration is not persistent across the reboots if performed using the
procedure specified above. To keep the IPoIB configuration persistent across reboots, and
ensure the interface initializes at boot, create a new script file for the InfiniBand interface
(ib0 in this example) and enter the device name, IP address and subnet mask information
as shown in Example 5-4.
Example 5-4 Configuring the IPoIB interfaces on the blade server
[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-ib0
DEVICE=ib0
BOOTPROTO=static
IPADDR=172.16.240.10
NETMASK=255.255.255.0
ONBOOT=yes
3. After the configuration parameters listed in Example 5-4 are entered in
/etc/sysconfig/network-scripts/ifcfg-ib0 file, save and close the file.
4. Follow the same procedure to configure additional InfiniBand interfaces on the same or
different blade servers.
5. If you used the procedure listed in Example 5-3, you still need to initialize the IPoIB
interfaces, which is done by restarting the network services as shown in Example 5-5:
Example 5-5 Initialize the IPoIB interface
[root@localhost ~]# service network restart
Shutting down interface eth0: [ OK ]
Shutting down interface eth1: [ OK ]
Shutting down interface ib0: [ OK ]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface eth0:
Determining IP information for eth0... done.
[ OK ]
Bringing up interface ib0: [ OK ]
[root@localhost ~]#
6. Issue the command shown in Example 5-6 to verify the ib0 interface status.
Example 5-6 Verify the ib0 interface
[root@localhost ~]# ifconfig ib0
- Redpaper 1
- October 2007 3
- Contract with IBM Corp 4
- Contents 5
- Contents v 7
- Trademarks 10
- Become a published author 13
- Comments welcome 13
- IBM BladeCenter products and 15
- 1.1 BladeCenter chassis 16
- 1.2 Blade servers 19
- 4X InfiniBand networking only 27
- InfiniBand products for 29
- BladeCenter 29
- OK (Green) and Fault (Yellow) 38
- 2.6.2 InfiniBand DDR HCAs 39
- InfiniBand technology 45
- 3.1.1 Upper layer protocols 46
- 3.1.2 Transport layer 46
- 3.1.3 Network layer 47
- 3.1.4 Data link layer 47
- 3.1.5 Physical layer 48
- 12X Link 49
- 3.2.3 Storage RDMA Protocol 50
- 3.3 Hardware 52
- 3.4 Management 52
- 3.5 Common markets 53
- 3.5.1 Application clustering 54
- 3.5.3 Storage area networks 54
- Configuring InfiniBand with 55
- QLogic bridges 55
- 4.1.1 Installing the drivers 56
- 4.1.5 Hints and tips 74
- Figure 4-66 Active SRP Map 89
- Figure 4-67 Add Direct Map 90
- Figure 4-70 93
- 5.2.3 Configuring IPoIB 105
- Cisco 3012 InfiniBand to FC 109
- 6.2 Blade booting from a SAN 110
- Installing hardware 111
- Figure 6-6 Define SRP host 114
- 6.2.5 Configuring storage 118
- 6.2.6 Discovering storage 119
- 6.2.8 Port masking 120
- Loading SCSI driver 128
- Loading ts_srp_host driver 128
- Configuring the Cisco 3012 131
- 7.2 Client information 136
- 7.3.1 The design 137
- EGW = Ethernet Gateway Module 147
- BG1 = Bridge Group 1 147
- Blue = InfiniBand 147
- Green = Ethernet 147
- Int Po5 153
- Figure 7-25 164
- 7.7 Useful CLI commands 169
- 7.7.2 For the 4948 170
- Abbreviations and acronyms 171
- Related publications 173
- Online resources 174
- Help from IBM 174
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