System FDB

The FDB system allows the user to view the fdb or forwarding database. This involves the Layer 2 (Ethernet MAC) and Layer 3 (IP) learned information.


System Forwarding Data Base (FDB)

Attribute  Value Comment
Phys address N/A

Displays IP Address for this sub-string. Field length is limited to xx characters. Example:172.25.123.45

Note: There can be up to 4 IP address bindings per MAC address and is displayed a1s 4 entries. The IP address may be blank if no binding is learned by the system.
VLAV ID String Represents the VLAN identifier. Values range from 2 through 4094, with 10 VLANs reserved for internal use.
AID

String

Displays the access identifier (AID) of the port. Example: Net 3.

Age String Shows the age of the MAC address.
Address String Shows the  MAC address of the device associated with the port.
MAC true | false Shows whether there is a Sticky MAC associated with the MAC Address (true/false). 
Note: If there is a Sticky MAC, it dynamically associates the mac-address to the respective port.
Time String Indicates the amount of time that DHCP snooping is allowed when DAI (FP 30.0 NE and later) is used.

 

 
Note 1: * = required parameter

System fdb l2 Show Example

The fdb l2 command gives all the learned MAC entries in the system.

 

  1. From the MDS1-ESUA# command line, input show tolt system fdb l2, and press Enter
  2. Outputs similar to the following are displayed:
MDS1-ESUA# show tolt system fdb l2 <enter>
                   VLAN
PHYS ADDRESS       ID    AID   AGE
------------------------------------
D8:9E:F3:B7:CD:A2  103   NET3  0
MDS1-ESUA# _

System fdb l3 Show Example

The fdb L3 command gives all the learned IP addresses that were learned during DHCP snooping.  DHCP snooping is only performed if DAI is enabled.

 

  1. From the MDS1-ESUA# command line, input show tolt system fdb l3, and press Enter
  2. Outputs similar to the following are displayed:
MDS1-ESUA# show tolt system fdb l3 <enter>
                   VLAN
PHYS ADDRESS       ID    AID   AGE  ADRESSES  MAC     TIME
-------------------------------------------------------------
D8:9E:F3:B7:CD:A2  103   NET3  0    -         false   0
MDS1-ESUA# _