Users Guide

914 Port-Based Traffic Control
Configuring LLPF
Use the following commands to configure LLPF settings. Most of these
protocols (other than CDP and UDLD) are obsolete and may cause excessive
CPU usage.
Command Purpose
configure Enter global configuration mode.
interface
interface Enter interface configuration mode for the specified
interface. The
interface variable includes the interface type
and number, for example tengigabitethernet 1/0/3.
A range of interfaces can be specified using the interface
range command. For example, interface range
tengigabitethernet 1/0/8-12 configures interfaces 8, 9, 10,
11, and 12.
service-acl input
{blockcdp | blockvtp |
blockdtp | blockudld |
blockpagp | blocksstp |
blockall}
Use the appropriate keyword, or combination of keywords
to block any (or all) of the following PDUs on the
interface:
• CDP — Cisco Discovery Protocol
• VTP — VLAN Trunking Protocol
• DTP — Dynamic Trunking Protocol
• UDLD — Unidirectional Link Detection
• PAgP — Port Aggregation Protocol
• SSTP — Secure Socket Tunneling Protocol
•All
CTRL + Z Exit to Privileged Exec mode.
show service-acl
interface { interface |
all}
View information about the blocked PDUs on the
specified interface or all interfaces.