Cisco Ethernet switch Operations Instructions download pdf (Page 172)

158 Cisco Systems Intelligent Gigabit Ethernet Switch Module

򐂰 Ping from BladeServer4 to 10.1.35.254 (HSRP address on the 6500s)

򐂰 Ping from BladeServer4 to 10.1.40.254 (HSRP address on the 6500s)

򐂰 Ping from BladeServer4 to 10.1.45.254 (HSRP address on the 6500s)

򐂰 Ping from BladeServer4 to 10.1.50.254 (HSRP address on the 6500s)

At this time, you should be able to ping as just described. If you cannot ping to these

addresses, and your configuration checks above were okay, proceed to the next section and

inspect the other components in this configuration.

At this time, you can also experiment with taking down links on the servers running SLB

(BladeServer3 and BladeServer4). Start up a continuous ping (-t option) from the desired

blade server to the appropriate HSRP address for the subnet, and go into the Cisco Systems

IGESMs and try shutting down G0/3 and G0/4 on one or the other Cisco Systems IGESMs

(do not take both g0/3 or both g0/4 ports down at the same time, because that will cause the

relevant blade server to lose all connectivity, which is expected behavior if you kill all ports in

an SLB connection). You might lose a ping or two, but generally, the pings should continue

regardless of which g0/3 or g0/4 you take down.

With this configuration (per this example), you cannot ping the management VLAN on the

Cisco Systems IGESMs. This is because it is on a different VLAN than the blade servers. Also

note that, for several reasons, we highly recommend that you do not put any blade servers on

the same VLAN as the management VLAN in use by the Cisco Systems IGESMs.

Verifying correct operation on the Cisco Systems IGESM

Confirm your Cisco Systems IGESM configuration using the following commands.

To confirm you are on the correct switch, use the show platform summary command (this

shows what slot you are currently on, for example, Slot 1 = CIGESM1, Slot 2 = CIGESM2).

Do a show run command and confirm that it matches the desired configuration as entered in

the previous steps.

Do a show logging command and look for any unexpected errors.

On CIGESM1:

򐂰 Do a show int g0/1 status. Should show status - connected and vlan - trunk.

򐂰 Do a show int g0/2 status. Should show status - connected and vlan - 10.

򐂰 Do a show int g0/3 status. Should show status - connected and vlan - 30.

򐂰 Do a show int g0/4 status. Should show status - connected and vlan - trunk.

On CIGESM2:

򐂰 Do a show int g0/1 status. Should show status - connected and vlan - trunk.

򐂰 Do a show int g0/2 status. Should show status - connected and vlan - 20.

򐂰 Do a show int g0/3 status. Should show status - connected and vlan - 30.

򐂰 Do a show int g0/4 status. Should show status - connected and vlan - trunk.

Run the show interface trunk module 0 command and check for the desired output (it

should be

similar for both Cisco Systems IGESMs):

Port Mode Encapsulation Status Native vlan

Gi0/1 on 802.1q trunking 2

Gi0/2 off 802.1q not-trunking 2

Gi0/3 off 802.1q not-trunking 2

Gi0/4 on 802.1q trunking 2

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