((When the CAM table is full, all excess unicast frames are treated as broadcast frames.
When this occurs it is possible for traffic to leak between VLANs )).
The first paragraph is ok for me,,,but the second one, I get confused,, my confusion is this: if there is broadcast within a specific VLAN (in case if CAM is not full),,we do not put in our consideration might be there is a broadcast leakage ,,,,Don't we? Why do we consider that (a broadcast leakage) when the CAM table is full ?
Re: CAM Table when it gets full and broadcast leakage
The association of a frame with a particular vlan is learned via the CAM table (or mac-address table). When a node transmits a frame, the switch will be able to determine it's originating port and this is called learning. So, learning is done via the source-adresses which are mostly unicast. This is the key to your question.
If the table is not filled, the originating port (and hence it's associated vlan-id) are always learned, no problem here. If the table is overflowing, the switch is unable to determine (or remember) from which vlan the packet originated which opens the possibility of transmitting it with an incorrect vlan-id.
Broadcast adresses (all 1's) are not in the table and you will never see a frame with "broadcast" as the source address.
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
login w/ SSH 1 or 2 to the device compare to IOS device. After
investigation, the there is 1s delay between the client KEXDH_INIT and
the server (XR) KEXDH_REPLY. After debug ssh serv...
Introduction The purpose of this document is to demonstrate the Open
Shortest Path First (OSPF) behavior when the V-bit (Virtual-link bit) is
present in a non-backbone area. The V-bit is signaled in Type-1 LSA only
if the router is the endpoint of one or ...
Hi, I am seeing quite a few issues with patch install and wanted to
share my experience and workaround to this. Login to admin via CLI, then
access root with the “shell” command Issue “df –h” and you’ll probably
see the following directory full or nearly ...