Cisco CATALYST 2960 - The client, Switch A, broadcasts a DHCPDISCOVER message to locate a DHCP server. The DHCP server offers configuration parameters (such as an IP address, subnet mask, gateway IP address, DNS IP address, a lease for the IP address, and so forth) to the client in a DHCPOFFER unicast message.; The DHCP server confirms that the IP address has been allocated to the client by returning a DHCPACK unicast message to the client. With this message, the client and server are bound, and the client uses configuration information received from the server. The amount of information the switch receives depends on how you configure the DHCP server. For more information, see the “Configuring the TFTP Server” section on page 3-7.

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Catalyst 2960 Switch Command Reference
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Chapter 2 Catalyst 2960 Switch Cisco IOS Commands
deny (MAC access-list configuration)
Note Though visible in the command-line help strings, appletalk is not supported as a matching condition.
To filter IPX traffic, you use the type mask or lsap lsap mask keywords, depending on the type of IPX
encapsulation being used. Filter criteria for IPX encapsulation types as specified in Novell terminology
and Cisco IOS terminology are listed in Table 2-4.
Defaults This command has no defaults. However; the default action for a MAC-named ACL is to deny.
Command Modes MAC-access list configuration
Command History
lsap lsap-number mask (Optional) Use the LSAP number (0 to 65535) of a packet with 802.2
encapsulation to identify the protocol of the packet.
mask is a mask of don’t care bits applied to the LSAP number before
testing for a match.
mop-console (Optional) Select EtherType DEC-MOP Remote Console.
mop-dump (Optional) Select EtherType DEC-MOP Dump.
msdos (Optional) Select EtherType DEC-MSDOS.
mumps (Optional) Select EtherType DEC-MUMPS.
netbios (Optional) Select EtherType DEC- Network Basic Input/Output System
(NETBIOS).
vines-echo (Optional) Select EtherType Virtual Integrated Network Service (VINES)
Echo from Banyan Systems.
vines-ip (Optional) Select EtherType VINES IP.
xns-idp (Optional) Select EtherType Xerox Network Systems (XNS) protocol
suite (0 to 65535), an arbitrary Ethertype in decimal, hexadecimal, or
octal.
Table 2-4 IPX Filtering Criteria
IPX Encapsulation Type
Filter CriterionCisco IOS Name Novel Name
arpa Ethernet II Ethertype 0x8137
snap Ethernet-snap Ethertype 0x8137
sap Ethernet 802.2 LSAP 0xE0E0
novell-ether Ethernet 802.3 LSAP 0xFFFF
Release Modification
12.2(25)FX This command was introduced.