Enabling and Configuring the Control Bridge

To be manually configured, a PE must run a router image because spx pe-enable configuration is not available in the switch image. In contrast, Zero-touch deployment and SPX interactive-setup can discover a standalone running either the router or switch image and reload it to a PE.

The following procedure assumes that the core stack of ICX devices that will become the control bridge (CB) is connected and functioning, and that the ICX ports in the stack to be used as SPX connections have been identified.

Note: The following procedure describes CB configuration from an ICX stack. The same procedure can be performed from a standalone ICX 7650, ICX 7750, or ICX 7850. The only restriction is that the same port cannot be configured as a stacking port or trunk and as an SPX port or LAG.

Samples need to be replaced with new samples based on an ICX 7650 core stack as CB.
In global configuration mode on the active controller for the stack that will serve as the control bridge (CB), enter the spx cb-enable command.
```
ICX7750-26Q Router# configure terminal
ICX7750-26Q Router(config)# spx cb-enable
System is now in 802.1br control bridge (CB) mode. 
```
Note: The CB must be running LLDP to support a Campus Fabric environment. If LLDP is not already running, it is enabled on SPX ports by the spx cb-enable command. Enabling or disabling SPX does not affect LLDP on data ports, and enabling or disabling LLDP on data ports does not affect enabled SPX ports.

Note: When spanning tree is configured on the standalone unit or stack, the spx cb-enable command requires a reload. After you enter the command, the system prompts you that spanning tree configuration is present and requires you to confirm the reload before the CB is enabled. CB units but not PE units are reloaded when you confirm. Disabling the CB with the no spx cb-enable command also requires a reload if spanning tree configuration is present.

Still in global configuration mode on the active controller, use the spx cb-configure command to enter CB configuration mode as shown in the following example.

ICX7750-26Q Router(config)# spx cb-configure
ICX7750-26Q Router(config-spx-cb)# ?
multi-spx-lag                 Configure two lags of a live link
multi-spx-port                Configure two ports of a live link
pe-id                         PE ID assignment provision
spx-lag                       Configure one CB lag
spx-port                      Configure one or more CB ports
zero-touch-enable             actively send probe
zero-touch-ports              Configure zero touch ports

Use the spx-port command followed by an appropriate port number and an optional group name to designate a port that will be used to connect to attached PE units.

Note: The pe-group name option appears in SPX show commands and can be included as a PE port identifier in the spx pe-id command.
The following example creates an SPX port on CB unit 1.
```
ICX7750-26Q Router(config-spx-cb)# spx-port 1/1/10
```
The following example creates an SPX port on CB unit 2 and gives it a group name.
```
ICX7750-26Q Router(config-spx-cb)# spx-port 2/1/1 pe-group bldg1-stk7
```

Configure CB LAGs (trunks) as needed. Use the spx-lag command followed by an appropriate port range and an optional group name to designate the CB LAG.

Note: An SPX LAG can contain from 2 through 16 ports. ICX 7650, ICX 7750, or ICX 7850 CB units, ICX 7450 PE units, and ICX 7250 PE units support a maximum of 16 ports in an SPX LAG. ICX 7150 PE units support a maximum of 8 ports.

Note: The rules governing LAG ranges in conjunction with port lists are covered in Differences in Campus Fabric configuration practices.
The following example creates one end of a two-port SPX LAG on CB unit 2.
```
ICX7750-26Q Router(config-spx-cb)# spx-lag 2/1/10 to 2/1/11
```
The following example creates one end of a two-port CB LAG. The LAG includes ports from CB unit 2 and CB unit 3.
```
ICX7750-26Q Router(config-spx-cb)# spx-lag 2/1/10 to 2/1/11 3/1/10
```
The following example creates one end of a CB LAG. The trunk is given a group name.
```
ICX7750-26Q Router(config-spx-cb)# spx-lag 3/1/3 to 3/1/5 pe-group bldg1-finance
```

RUCKUS FastIron Campus Fabric Configuration Guide, 08.0.95 53-1005651-02

Enabling and Configuring the Control Bridge

In this section: