Fujitsu BX600 SB9 manual Configure a Link State Group

White Paper ⏐ Issue: October 2006 ⏐ Integration of BX600 SB9 Switches in Cisco Networks Page 31 / 47

2.6 Link State

2.6.1Introduction

BX600 Blade Servers are equipped with 2 independent LAN ports by default. LAN Port redundancy is realized by utilizing NIC management programs with LAN teaming functions such as ‘Broadcom BACS’, ‘Intel ProSETII’ and ‘Linux Channel Bonding’. However the server blade cannot detect a link down situation or a port failure situation timely if link failures occur on the uplink port(s) on SB9 Switch connected to the next higher level switches. In this case, it takes a long time (over 5-10 seconds) to perform a NIC failover via the teaming software of the server blade (it depends on polling period implemented in NIC management program). In order to realize a “rapid” fail-over of redundant blade server LAN ports, SB9 is able to shut down ports linked to server blades (internal ports) whenever an uplink port (external port) fails. If the upstream port is resumed to active state, the downstream ports will be enabled again.

Cisco

0/11

SB9

0/11 external Ports

uplinks

Gi 0/1

downlinks

internal Ports

link state group

SB9

detail

Figure 12 : Link State Group

2.6.2Recommended Solution

The SB9 provides a monitor task to see the link level of the upstream ports. If any upstream port fails, SB9 will disable the downstream ports belonging to the same Link State Group. This enables the LAN Teaming Software to detect the link failure and to switch the LAN port from failed one (Link down) to a working one in a short time. We recommend configuring link state groups for the considered ports in the customer configuration to improve failover behaviour

2.6.3Configuration

The following steps are necessary to set up a Link State Group:

∙1. Enable the Link State feature and create a Link State Group

∙2. Configure the up- and downstream ports and enable the configured Link State Group

∙3. Verify the configuration

Step 1: Configure a Link State Group

link state

!Enables the Link State admin mode link state group

!Creates a link state group

Step 2: Configure the up- and downstream ports and enable the configured Link State Group

interface range 0/1 – 0/4 link state group 1 downstream

!Sets the downstream port(s) for a Link State Group (Port 1 to 4 in this example) exit

interface 0/11

link state group 1 upstream

!Sets the monitored upstream port for a Link State Group exit

link state group enable 1

! Enables the configured Link State Group