3

Monitor Size of the CAM Table on a Cisco Switch

view full story
linux-howto

http://serverfault.com – We noticed some stray packets from our switch going out ports they should not have. After clearing the cam table with clear mac address-table the problem seems to have gone away. Our best theory at the moment is that the table got flooded at some point causing the switch to exhibit this hub like behavior. Does anyone know if the size of the table can be monitored via SNMP so we can track this? (HowTos)

grtyyu's picture
Submitted by grtyyu on 05/23/2012 – Made popular on 05/23/2012

Stories similar to Monitor Size of the CAM Table on a Cisco Switch

When the switch CAM table is empty and it receives an ARP message, does it add to the CAM table the source MAC address ?

In Packet Tracer I saw that it does add it, but I read in some book that the switch ignores them.

Thank you.

I'm learning the network basics at my university this semester. I had a question on the mid-term exam and unfortunately ,I answered it wrong. I have a final exam about an hour from now, and I still don't know what the correct answer of that question is. However, here is my question:

A network of several PCs, switches, and one router. PC 1 has a MAC address X.

MAC address table in Windows 40 weeks 4 days ago

How can I see the MAC address table of a Windows network bridge? Is it possible trough command line to find this information?

EDIT: I am interested to see the same table that it is possible to see in the managed switches (e.g. like the Cisco's show mac-address-table or Linux brctl showmacs br0)

I noticed that one of my servers was running out of disk space, due to heavy MySQL usage. I stopped everything using the database, freed up some space and restarted mysqld.

Now, I checked my table with CHECK TABLE table and it gave me this:

+-------------------+-------+----------+---------------------------------------------------------------+ | Table | Op | Msg_type | Msg_text

Problem with 2 links Firewall 3 years 31 weeks ago

Hi, i want to fail over under my 2 links. I try use this command:

# ip route add default nexthop via 192.168.7.1 nexthop via 192.168.0.1 table 2

But i recive a error with table 2. Someone knows how to do this apply in table ? If i cut table 2 works. But i need this in the table 2.

Move Big Table from AWS MYSQL 13 weeks 3 days ago

I have a question about getting a huge table to local machine from mysql running in AWS. I just created a table which has a size of 2.3GB, however I have only 2 GB free disk space. This lead into a situation that I even can not dump my table into a dump file which would cause error 28. Then I have two choices.

Clean up the disk with 300+MB free space.

I've been using transactional replication to mirror a table from one database to another and lately it's been a pain to keep running.

My goal is to simply keep an exact copy of a table in another database.

Table inserts are about 100 a day from the ASP page from which records submitted, up to a maximum of 400 per day on peak days.

The total records in the table wind up to be about 20,000 by the

I ran fdisk on the wrong HD. I basically cleared partition table, pressed w and quited fdisk and only then realized that that was my main harddrive...

I got this message:

WARNING: Re-reading the partition table failed with error 16: Device or resource busy. The kernel still uses the old table.

The command: show mac address-table gives me me mac address info i like. I'm trying to figure out to get this to dump to a server once a month as a text file. Each time it would dump, the previous file would be overwritten with the new one. Lets say the switch is 192.168.4.6 and computer is 192.168.4.7 Do I need to setup TFTP or SNMP? Could this even be done?