CHAPTER:
LOGIN AND MANAGEMENT,
SECTION:
MAC-ADDRESS TABLE (FDB)
UM-G-iSG18GFP-4.5.06.1-EN.docx
© 2020 IS5 COMMUNICATIONS Inc. ALL RIGHTS RESERVED
-
switchport unicast-mac learning limit
<limit value(0-100)>
-
switchport unicast-mac learning
{
enable | disable
}
-
switchport ingress-filter
-
multicast-mac limit
<limit>
- clear fdb
- show mac-address-table
- show vlan port config
- show multicast-mac limit
For MAC traffic to be learned with a proper VLAN tag, ingress-filtering must be
enabled on the interface. Otherwise, it will be learned at VLAN 1.
IP traffic will be learned with the VLAN tag by default.
7.13.3 Configuration Example, Static MAC entry
1. Place a static entry
iSG18GFP(config)# mac-address-table static unicast 02:20:d2:fc:1c:95 vlan 1 interface fastethernet 0/4
iSG18GFP# show mac-address-table
Switch default
Vlan Mac Address Type Connection ID Ports
---- ----------- ---- ----------- -----
1 02:20:d2:fc:1c:95 Static Fa0/4
4092 02:20:d2:fc:1c:78 Static Gi0/3
4092 02:20:d2:fc:1c:79 Static Fa0/10
4092 02:20:d2:fc:1c:7a Static Fa0/11
Total Mac Addresses displayed: 4
2. Remove a static entry
iSG18GFP(config)# no mac-address-table static unicast 02:20:d2:fc:1c:95 vlan 1
7.13.4 Example of Exceeding MAC Learning Limit at a port
1. Set MAC Learning Limit for an interface.
config
interface fastethernet 0/1