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Chapter 7
Configuring Spanning Tree
VLAN
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Total
Console> (enable)
Configuring Layer 2 PDU Rate Limiting on the Switch
This feature is only supported with PFC3A or later PFC.
Note
This feature does not work in truncated mode.
Note
You can use the Layer 2 PDU rate limiters to limit the number of packets to a normal rate and to avoid
abnormal incoming rates.
The commands that support Layer 2 PDU rate limiting allow you to perform these functions:
•
•
•
All three types of rate limiters work independently of each other.
To enable or disable Layer 2 PDU rate limiting, enter the set rate-limit {l2pdu | l2port-security |
l2protocol-tunnel} {enable | disable} command. Layer 2 PDU rate limiting is disabled by default.
To configure Layer 2 PDU rate limiting, perform this task in privileged mode:
Task
Step 1
Enable Layer 2 PDU rate limiting.
Step 2
Set the rate limiter value.
Step 3
Verify the configuration.
Use the l2pdu keyword for rate limiting the Layer 2 protocol packets including the following:
•
•
OL-8978-04
Blocking Listening Learning Forwarding STP Active
1
6
4
Blocking Listening Learning Forwarding STP Active
6
4
Enable, disable, or set rate limiting for the spanning-tree BPDUs—IEEE and PVST/Shared
Spanning Tree Protocol (SSTP), Cisco Discovery Protocol (CDP), Dynamic Trunking Protocol
(DTP), UniDirectional Link Detection (UDLD), VLAN Trunking Protocol (VTP), Link
Aggregation Control Protocol (LACP), and Port Aggregation Protocol (PAgP)—globally on the
switch.
Enable, disable, or set rate limiting for the Layer 2 protocol tunnel-encapsulated PDUs globally on
the switch.
Enable, disable, or set the 802.1X port security rate limiters globally on the switch.
Spanning-tree IEEE—destination MAC address 01-80-c2-00-00-00
PVST/SSTP—destination MAC address 01-00-0C-CC-CC-CD
Configuring Layer 2 PDU Rate Limiting on the Switch
2
0
2
0
Command
set rate-limit {l2pdu | l2port-security |
l2protocol-tunnel} enable
set rate-limit {l2pdu | l2port-security |
l2protocol-tunnel} rate rate
show rate-limit
show rate-limit config
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
12
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7-61
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