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bpdu-drop any
Syntax
bpdu-drop any
undo bpdu-drop any
View
Ethernet port view
Parameters
None
Description
Use the
bpdu-drop any
command to enable BPDU dropping on the Ethernet port.
Use the
undo bpdu-drop any
command to disable BPDU dropping on the Ethernet port.
By default, BPDU dropping is disabled.
In a STP-enabled network, some malicious users may send BPDU packets to the switch continuously in
order to destabilize the network. When a switch receives the BPDU packets, it will forward them to other
switches. As a result, STP calculation is performed repeatedly, which may occupy too much CPU of the
switches or cause errors in the protocol state of the BPDU packets.
In order to avoid this problem, you can enable BPDU dropping on Ethernet ports. Once the function is
enabled on a port, the port will not receive or forward any BPDU packets. In this way, the switch is
protected against the BPDU packet attack and the STP calculation correctness is ensured.
Examples
# Enable BPDU dropping on Ethernet 1/0/1.
<Sysname>system-view
System View: return to User View with Ctrl+Z.
[Sysname] interface Ethernet 1/0/1
[Sysname-Ethernet1/0/1] bpdu-drop any
check region-configuration
Syntax
check region-configuration
View
MST region view
Parameters
None
Description
Use the
check region-configuration
command to display the MST region-related configuration which
is being modified currently, including region name, revision level, and VLAN-to-instance mapping table.
Содержание 5500-EI Series
Страница 43: ...2 6 ...
Страница 76: ...1 17 ...
Страница 228: ...ii stp transmit limit 1 44 vlan mapping modulo 1 45 vlan vpn tunnel 1 46 ...
Страница 477: ...5 24 Sysname vlan 2 Sysname vlan2 service type multicast ...
Страница 503: ...2 3 System View return to User View with Ctrl Z Sysname dot1x url http 192 168 19 23 ...
Страница 519: ...iii ...
Страница 597: ...2 2 security policy server 192 168 0 1 user name format without domain ...
Страница 648: ...1 9 Examples Clear static ARP entries Sysname reset arp static ...
Страница 663: ...4 3 Sysname resilient arp interface vlan interface 2 ...
Страница 767: ...1 28 From 12 00 Jan 1 2008 to 12 00 Jun 1 2008 ...
Страница 1111: ...ii xmodem get 3 18 ...
Страница 1314: ...A 44 Z ...