Cisco Catalyst 3750 User Manual

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Catalyst 3750 Switch Command Reference
OL-8552-07
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
reserved-only
reserved-only
Use the reserved-only DHCP pool configuration mode command to allocate only reserved addresses in
the Dynamic Host Configuration Protocol (DHCP) address pool. Use the no form of the command to
return to the default.
reserved-only
no reserved-only
Syntax Description This command has no arguments or keywords.
Defaults The default is to not restrict pool addresses
Command Modes Privileged EXEC
Command History
Usage Guidelines Entering the reserved-only command restricts assignments from the DHCP pool to preconfigured
reservations. Unreserved addresses that are part of the network or on pool ranges are not offered to the
client, and other clients are not served by the pool.
By entering this command, users can configure a group of switches with DHCP pools that share a
common IP subnet and that ignore requests from clients of other switches.
To access DHCP pool configuration mode, enter the ip dhcp pool name global configuration command.
Examples This example shows how to configure the DHCP pool to allocate only reserved addresses:
Switch# config t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# ip dhcp pool test1
Switch(dhcp-config)# reserved-only
You can verify your settings by entering the show ip dhcp pool privileged EXEC command.
Release Modification
12.2(50)SE This command was introduced.

Cisco Catalyst 3750 Specifications

General

Device Type	Switch
Switching Capacity	32 Gbps
Forwarding Rate	38.7 Mpps
Stacking Bandwidth	32 Gbps
RAM	128 MB
Jumbo Frame Support	Yes
Switch Type	Managed
Model	Catalyst 3750 Series
Uplink Interfaces	SFP
Form Factor	Rack-mountable
MAC Address Table Size	12, 000 entries
Routing Protocol	RIP, OSPF, EIGRP
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Layer 3 switching, Layer 2 switching, auto-negotiation, BOOTP support, ARP support, VLAN support, auto-uplink (auto MDI/MDI-X), IGMP snooping, traffic shaping, MAC address filtering, Quality of Service (QoS), Jumbo Frames support, MLD snooping, Dynamic ARP Inspection (DAI), Cisco EnergyWise technology
Power over Ethernet (PoE)	PoE
Operating Temperature	-5 - 45 °C
Operating Humidity	10% to 85% non-condensing