ELTEX MES3108 - Page 180

180 MES3000 Ethernet switch series
allowed-untrusted
82 from untrusted ports is
disabled.
no ip dhcp snooping
information option
allowed-untrusted
Deny to receive DHCP packets with Option 82 from untrusted ports.
ip dhcp snooping verify
Verification is enabled by
default.
Enable verification of client and source MAC addresses received in
DHCP packet from the untrusted port.
no ip dhcp snooping verify
Disable verification of client and source MAC addresses received in
DHCP packet from the untrusted port.
ip dhcp snooping database
Backup file is not used
Allow DHCP management backup file (database) usage.
no ip dhcp snooping
database
Deny DHCP management backup file (database) usage.
ip dhcp snooping database
update-freq seconds
(600 – 86400)/1200
Define DHCP management file (database) update rate.
no ip dhcp snooping
database update-freq
seconds
Restore the default value.
ip dhcp information option
Adding Option 82 is
enabled by default.
Allow the device to add Option 82 in DHCP operation.
no ip dhcp information
option
Deny the device to add Option 82 in DHCP operation.
ip dhcp information option
format-type access-node-id
node_id
node_id: 1..32 characters
Specify the access-node_id identifier of option 82.
no ip dhcp information
option format-type access-
node-id
Set the default value.
ip dhcp information option
format-type remote-id
remote_id
remote_id: (1..32)
characters/-
Specifies the Option 82 remote_id identifier.
no ip dhcp information
option format-type
remote-id
Set the default value.
ip dhcp information option
format-type option format
[delimeter delimeter]
format: (sp, sv, pv, spv, bin
user-defined);
delimeter: {. , ; # / space }
DHCP Option 82 format configuration.
Format:
- sp—slot and port number
- sv—slot and VLAN number
- pv—port and VLAN number
- spv—slot, port and VLAN number
- bin—binary format: VLAN, slot, port
- user-defined — format is definied by user. Following samples is
used for definition:
%h: hostname;
%p: short port name, e.g. gi1/0/1;
%P: long port name, e.g. gigabitethernet 1/0/1;
%t: port type (ifTable field value::ifType in hexadecimal numeral
system)
%m: MAC address of the port in H-H-H-H-H-H-H format;
%M: system MAC address in H-H-H-H-H-H-H format;
%u: unit number;
%s: slot number;
%n: port number (as it is shown on front panel);
%i: port ifindex;
%v: VLAN identifier;
no ip dhcp information
option format-type option
Set the default value.
ip dhcp information option
suboption type
{tr101|custom}
-/tr101
Option 82 format configuration.
- tr101—set the Option 82 format according to the syntax specified
in TR-101 recommendations.
- custom—set the Option 82 format according to the format from
Table 5.213.
no ip dhcp information
option suboption type
Restore the default value.