Specifications

244 ExtremeWare XOS 11.0 Concepts Guide
Extreme Standby Router Protocol
Displaying ESRP Information
To view ESRP information, use the following command:
show esrp
Output from this command includes:
• The operational state of an ESRP domain and the state of its neighbor
• ESRP port configurations
To view more detailed information about an ESRP domain, use the following command and specify the
domain name:
show esrp {<name>}
Output from this command includes:
• The operational state of an ESRP domain
• ESRP election policy
• ESRP tracking information
• Timer statistics
• State change information
To view ESRP counter information for a specific domain, use the following command:
show esrp {<name>} counters
To view ESRP-aware information for a specific domain (including the group number, MAC address for
the master, and the age of information) use the following command:
show esrp {<name>}
For more information about any of the commands used to enable, disable, or configure ESRP, refer to
the ExtremeWare XOS Command Reference Guide.
ESRP Examples
This section provides examples of ESRP configurations.
Single Domain Using Layer 2 and Layer 3 Redundancy
The example shown in Figure 38 uses a number of Extreme Networks devices as edge switches that
perform Layer 2 switching for ESRP domain esrp1 and VLAN Sales. The edge switches are dual-homed
to the BlackDiamond 10808 switches. The BlackDiamond 10808 switches perform Layer 2 switching
between the edge switches and Layer 3 routing to the outside world. Each edge switch is dual-homed
using active ports to two BlackDiamond 10808 switches. ESRP is enabled on each BlackDiamond 10808
switch for the ESRP domain esrp1 that interconnects to the edge switches. Each BlackDiamond 10808
switch has the VLAN Sales configured using the identical IP address. The BlackDiamond 10808 switches
then connect to the routed enterprise normally, using the desired routing protocol (for example, RIP or
OSPF).