C
ONFIGURING
THE
S
WITCH
3-230
Web
– Click MVR, Group Member Configuration. Select a port or trunk
from the “Interface” field, and click Query to display the assigned
multicast groups. Select a multicast address from the displayed lists, and
click the Add or Remove button to modify the Member list.
Figure 3-105. MVR Group Member Configuration
CLI
– This example statically assigns a multicast group to a receiver port.
DHCP Snooping
DHCP snooping allows a switch to protect a network from rogue DHCP
servers or other devices which send port-related information to a DHCP
server. This information can be useful in tracking an IP address back to a
physical port.
Network traffic may be disrupted when malicious DHCP messages are
received from an outside source. DHCP snooping is used to filter DHCP
messages received on a non-secure interface from outside the network or
firewall. When DHCP snooping is enabled globally and enabled on a
VLAN interface, DHCP messages received on an untrusted interface from
a device not listed in the DHCP snooping table will be dropped.
Console(config)#interface ethernet 1/2
Console(config-if)#mvr group 228.1.23.1
4-253
Console(config-if)#
Summary of Contents for 6128L2
Page 2: ......
Page 21: ...CONTENTS xvii Glossary Index ...
Page 22: ...CONTENTS xviii ...
Page 26: ...TABLES xxii ...
Page 40: ...INTRODUCTION 1 10 ...
Page 54: ...INITIAL CONFIGURATION 2 14 ...
Page 193: ...PORT CONFIGURATION 3 139 Figure 3 61 Displaying Etherlike and RMON Statistics ...
Page 257: ...QUALITY OF SERVICE 3 203 Figure 3 90 Configuring Policy Maps ...
Page 313: ...COMMAND GROUPS 4 13 PE Privileged Exec VC VLAN Database Configuration ...
Page 592: ...TROUBLESHOOTING B 4 ...
Page 605: ......