Table Of Contents

Configuration Examples

Managing Power in a LAN

Managing Power with IP Routing

Configuration Examples

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•Managing Power in a LAN

•Managing Power with IP Routing

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Note The examples in this document are for a Catalyst 3750-E or 3750 switch (for example, gigabitethernet 1/0/5). To specify an interface on your network device, see your device software documentation.

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Managing Power in a LAN

Multiple switches connected in the same LAN and in the same EnergyWise domain.

Figure 4-1 EnergyWise with LANs

The domain configuration includes

•UDP default port (43440)

•Gigabit Ethernet port 1/0/23 on Switch 2 with a connected Catalyst PoE switch.

On Switch 1, configure the domain:

Switch(config)# energywise domain cisco secret 0 cisco protocol udp port 43440 interface 
gigabitethernet1/0/23

On Switch 1, verify that the EnergyWise protocols discovered the neighbors:

Switch# show energywise neighbors

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

                  S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone

Id   Neighbor Name            Ip:Port                 Prot   Capability

--   -------------            -------                 ----   ----------

4    Switch-2                 192.168.20.2:43440      udp    S I

Managing Power with IP Routing

Switch 1 and Switch 2 are in a disjointed domain. Neighbors might not be discovered automatically.

Figure 4-2 EnergyWise with IP Routing

On Switch 1, to prevent a disjointed domain, manually assign Switch 2 as a static neighbor or the reverse.

Switch(config)# energywise neighbor 192.168.2.2 43440

Switch 1 discovers Switch 3 as a neighbor because they are in the same LAN.

On Switch 1, verify neighbor discovery.

Switch# show energywise neighbors

Capability Codes: R-Router, T-Trans Bridge, B-Source Route Bridge

                  S-Switch, H-Host, I-IGMP, r-Repeater, P-Phone

Id   Neighbor Name         Ip:Port                Prot    Capability

--   -------------         -------                ----    ----------

6    Switch-2              192.168.2.2:43440      static  S I

9    Switch-3              192.168.1.3:43440      cdp     S I

Switch 1 uses both static and dynamic protocols to detect neighbors.

Verify that switches are in the same domain:

Switch# energywise query name * collect usage

EnergyWise query, timeout is 3 seconds:

Host            Name            Usage

----            ----            -----

192.168.1.2     Switch-1        96.0 (W)

192.168.40.2    shipping.1      6.3 (W)

192.168.40.2    guest.1         10.3 (W)

192.168.50.2    shipping.2      8.5 (W)

192.168.50.2    lobby.1         10.3 (W)

Queried:  72    Responded:  72      Time:  0.65 second

In a routed network, a switch port assigned to a VLAN can be connected to a router interface. The IP address of the VLAN SVI is 192.168.1.2, and the IP address of the router interface is 192.168.1.1.

Configure the domain:

Switch(config)# energywise domain cisco secret 0 cisco protocol udp port 43440 ip 
192.168.1.2

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Note To prevent a disjointed domain, you can also configure a helper address on Router A and specify that the router use UDP to forward broadcast packets with the

ip helper-address address interface configuration command.

ip forward-protocol udp [port] global configuration command.

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