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Here is the Option 82 definition of the switch.
1. Circuit ID sub-option setup information for DHCP server :
<Format>
[Slot ID/1-Byte] [Port ID/1-Byte] [VLAN ID/2-Bytes] [Information/X-
Bytes]
Slot ID - plase set to “0”.
Port ID - please set according to the port number of the switch.
VLAN ID - please set according to its VLAN ID.
Information - this is a string with variable length
For example, “000500c8” means Slot ID 0, Port 5, VLAN ID 200, no
information. All of the numbers are hexadecimal numbers.
2. Remote ID sub-option setup information for DHCP server :
<Format>
[Mac Address/6-Bytes]
Mac Address - this is the Mac Address of the switch. For example,
“000000828ce6” in hexadecimal numbers.
If the Option 82 of DHCP request meets these settings, DHCP server will
assign the IP configuration according to this Option 82 content.
Entering “dhcp-relay ?”, the sub-commands will be shown.
(config)# dhcp-relay ?
helper-address Specify DHCP servers' IP addresses
information Specify a additional information for DHCP Option 82
option Enable to add the additional information to Option 82
<cr> Enable DHCP relay
dhcp-relay command is used to enable DHCP Relay function. “no dhcp-relay”
command is used to disable it.
dhcp-relay helper-address xxx.xxx.xxx.xxx command is used to assign the
DHCP server for DHCP Relay operation. “xxx.xxx.xxx.xxx” is the IP address
of DHCP server.
dhcp-relay information xxx command is used to specify the additional
information string for DHCP Option 82 operation. “xxx” is the string.
dhcp-relay option command is used to enable adding the additional string to
Option 82. “no dhcp-relay option” command is used to disable it.
10 dot1x command
This command is used configure the general settings of 802.1x function of the
switch. Entering “dot1x ?”, the sub-commands will be shown.
(config)# dot1x ?
authcount Set 802.1x Re-authentication Max Count
dynamic-vlan VLANs are assigned based on a MAC address
guest-vlan Migrating end users to an 802.1X environment and for delivering
limited services to unauthorized users
max-req Max EAP request/identity packet retransmissions
re-authentication Forces re-authentication on all ports/interfaces
system-auth-control Enables/disables 802.1x to change port modes
timeout Timeout value
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