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
ipv6 dhcp ping packets
ipv6 dhcp ping packets
Use the ipv6 dhcp ping packets global configuration command to specify the number of packets a
Dynamic Host Configuration Protocol for IPv6 (DHCPv6) server sends to a pool address as part of a
ping operation. To prevent the server from pinging pool addresses, use the no form of this command.
ipv6 dhcp ping packets number
no ipv6 dhcp ping packets
Note This command is available only if you have configured a dual IPv4 and IPv6 Switch Database
Management (SDM) template on the switch stack.
Syntax Description
Defaults The default is 0.
Command Modes Global configuration
Command History
Usage Guidelines To configure the dual IPv4 and IPv6 template, enter the sdm prefer dual-ipv4-and-ipv6 {default |
vlan} global configuration command, and reload the switch.
The DHCPv6 server pings a pool address before assigning the address to a requesting client. If the ping
is unanswered, the server assumes, with a high probability, that the address is not in use and assigns the
address to the requesting client.
Setting the number argument to 0 turns off the DHCPv6 server ping operation.
Examples This example specifies two ping attempts by the DHCPv6 server before further ping attempts stop:
Switch(config)# ipv6 dhcp ping packets 2
number The number of ping packets sent before the address is assigned to a
requesting client. The range is 0 to 10.
Release Modification
12.2(46)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