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Can the forwarding table of a switch contain multiple entries for the same MAC address?
Single Forwarding Database Operation This is not a problem for a switch with a multiple forwarding database because the switch allows multiple instances of a given MAC address; one for each valid destination. However, a switch with a single forwarding database allows only one instance of a given MAC address.
Which type of memory does a switch use to build the MAC address table?
Content Addressable Memory
Content Addressable Memory (CAM) table is a system memory construct used by Ethernet switch logic which stores information such as MAC addresses available on physical ports with their associated VLAN Parameters. The CAM table, or content addressable memory table, is present in all switches for layer 2 switching.
Are there switches that allow to set multiple VLANs?
There are switches that allow to set multiple untagged VLANs on a single port, with the traffic being passed into PVID of that port …but learning MACs and passing incoming broadcast frames. There are switches that won’t allow to disable default VLAN (VID=1) despite using other PVID on the port.
How many MAC addresses are in a switch?
I am facing a situation where on the core network I have around 15k MAC addresses, and on the edge switches (Access Layer), I am finding switches with 27k MAC addresses. Access switches are configured to allow one MAC address per interface, and if there is VoIP, two MAC addresses per interface.
Can a Cisco NIC have the same MAC address?
– Network Engineering Stack Exchange Will duplicated MAC address give problems, if in different VLANs? A small company has 2 Cisco Catalyst 3550, with 24 ports each, connecting their equipaments. After some trouble, we found that two NICs had the same MAC address.
Can a duplicate MAC address cause a problem?
Will duplicated MAC address give problems, if in different VLANs? A small company has 2 Cisco Catalyst 3550, with 24 ports each, connecting their equipaments. After some trouble, we found that two NICs had the same MAC address. After the initial reaction of blaming who bought such NICs, etc.,