204
C
HAPTER
13: MSTP C
ONFIGURATION
C
OMMANDS
Description
Use the
stp tc-protection enable
command to enable the protection function so
that the switch is protected against attack from TC-BPDU packets.
Use the
stp tc-protection disable
command to disable the protection function.
By default, the protection against TC-BPDU packet attack is enabled.
As a general rule, the switch deletes the corresponding entries in the MAC address
table and ARP table upon receiving TC-BPDU packets. Under malicious attacks of
TC-BPDU packets, the switch shall receive a great number of TC-BPDU packets in a
very short period. Too frequent delete operations shall consume huge switch
resources and bring great risk to network stability.
When the protection from TC-BPDU packet attack is enabled, the switch just
perform one delete operation in a specified period (generally, 15 seconds) after
receiving TC-BPDU packets, as well as monitoring whether it receives TC-BPDU
packets during this period. Even if it detects a TC-BPDU packet is received in a
period shorter than the specified interval, the switch shall not run the delete
operation till the specified interval is reached. This can avoid frequent delete
operations to the MAC address table and ARP table.
Example
# Enable TC-BPDU protection on the switch.
<SW8800>system-view
System View: return to User View with Ctrl+Z.
[SW8800] stp tc-protection enable
stp timer forward-delay
Syntax
stp timer forward-delay
centi-senconds
undo stp timer forward-delay
View
System view
Parameter
centi-senconds
: Specifies Forward Delay, which is in the range from 400 to 3000
and measured in centiseconds. By default, the Forward Delay of the switch is 1500
centiseconds.
Description
Use the
stp timer forward-delay
command to configure Forward Delay for the
switch.
Use the
undo stp timer forward-delay
command to restore the default Forward
Delay.
To avoid temporary loop, MSTP defines a medium state, Learning, when the port
switches from the Discarding state to Forwarding state. There is also a delay before
state switchover to guarantee the synchronous switchover with the remote switch.
Summary of Contents for Switch 8807
Page 30: ......
Page 68: ...66 CHAPTER 2 COMMANDS USED TO LOG IN TO SWITCH ...
Page 78: ...76 CHAPTER 3 CONFIGURATION FILE MANAGEMENT COMMANDS ...
Page 96: ...94 CHAPTER 5 SUPER VLAN CONFIGURATION COMMANDS ...
Page 122: ...120 CHAPTER 8 IP PERFORMANCE CONFIGURATION COMMANDS ...
Page 130: ...128 CHAPTER 9 GARP GVRP CONFIGURATION COMMANDS ...
Page 162: ...160 CHAPTER 11 ETHERNET LINK AGGREGATION CONFIGURATION COMMANDS ...
Page 212: ...210 CHAPTER 13 MSTP CONFIGURATION COMMANDS ...
Page 234: ...232 CHAPTER 16 ACL COMMANDS ...
Page 282: ...280 CHAPTER 18 ACL CONTROL COMMANDS TO CONTROL LOGIN USERS ...
Page 293: ......
Page 294: ...292 CHAPTER 19 VLAN ACL CONFIGURATION COMMANDS ...
Page 310: ...308 CHAPTER 20 802 1X CONFIGURATION COMMANDS ...
Page 370: ...368 CHAPTER 21 AAA AND RADIUS HWTACACS PROTOCOL CONFIGURATION COMMANDS ...
Page 398: ...396 CHAPTER 23 STATIC ROUTE CONFIGURATION COMMANDS ...
Page 462: ...460 CHAPTER 25 OSPF CONFIGURATION COMMANDS ...
Page 498: ...496 CHAPTER 26 INTEGRATED IS IS CONFIGURATION COMMANDS ...
Page 548: ...546 CHAPTER 27 BGP CONFIGURATION COMMANDS ...
Page 570: ...568 CHAPTER 30 RECURSIVE ROUTING CONFIGURATION ...
Page 584: ...582 CHAPTER 32 MULTICAST VLAN CONFIGURATION COMMANDS ...
Page 600: ...598 CHAPTER 33 MULTICAST COMMON CONFIGURATION COMMANDS ...
Page 604: ...602 CHAPTER 34 STATIC MULTICAST MAC ADDRESS CONFIGURATION COMMAND ...
Page 656: ...654 CHAPTER 37 MSDP CONFIGURATION COMMANDS ...
Page 682: ...680 CHAPTER 38 MBGP MULTICAST EXTENSION CONFIGURATION COMMANDS ...
Page 762: ...760 CHAPTER 40 BGP MPLS VPN CONFIGURATION COMMANDS ...
Page 808: ...806 CHAPTER 44 HA CONFIGURATION COMMANDS_HA_CONFIGURATION ...
Page 820: ...818 CHAPTER 45 ARP CONFIGURATION COMMANDS ...
Page 824: ...822 CHAPTER 46 ARP TABLE SIZE CONFIGURATION COMMANDS max arp entry config of slot 13 8192 ...
Page 862: ...860 CHAPTER 47 DHCP CONFIGURATION COMMANDS ...
Page 870: ...868 CHAPTER 48 DNS CONFIGURATION COMMANDS ...
Page 972: ...970 CHAPTER 56 SSH TERMINAL SERVICE CONFIGURATION COMMANDS ...
Page 982: ...980 CHAPTER 57 FILE SYSTEM MANAGEMENT COMMANDS ...
Page 1026: ...1024 CHAPTER 60 INFORMATION CENTER ...
Page 1046: ...1044 CHAPTER 63 PORT PACKET STATISTICS COMMANDS ...
Page 1051: ...Ethernet Port Detection Configuration Commands 1049 ...
Page 1052: ...1050 CHAPTER 64 PORT LOOPBACK DETECTION COMMANDS ...
Page 1053: ...Ethernet Port Detection Configuration Commands 1051 ...
Page 1054: ...1052 CHAPTER 64 PORT LOOPBACK DETECTION COMMANDS ...
Page 1055: ......
Page 1056: ...1054 CHAPTER 64 PORT LOOPBACK DETECTION COMMANDS ...
Page 1057: ......
Page 1058: ...1056 CHAPTER 64 PORT LOOPBACK DETECTION COMMANDS ...
Page 1059: ...Ethernet Port Detection Configuration Commands 1057 ...
Page 1060: ...1058 CHAPTER 64 PORT LOOPBACK DETECTION COMMANDS ...
Page 1061: ......
Page 1062: ...1060 CHAPTER 64 PORT LOOPBACK DETECTION COMMANDS ...
Page 1063: ...Ethernet Port Detection Configuration Commands 1061 ...
Page 1064: ...1062 CHAPTER 64 PORT LOOPBACK DETECTION COMMANDS ...
Page 1065: ......
Page 1066: ...1064 CHAPTER 64 PORT LOOPBACK DETECTION COMMANDS ...
Page 1090: ...1088 CHAPTER 66 NQA CONFIGURATION COMMANDS ...