question about redistribution and switches

jlau2001

hi guys,

I just registered to this forum few days ago, great site indeed and I have learned a lot from it.

I have a few question regarding to redistribution and switches and these topics are puzzling me like crazy.

So here they are..

What is redistribution exactly ??? the only thing it does is route different between different routing protocols ?

and for the Switch questions is like this ..

let say a frame has Source Mac address of 1111.1111.1111 and destination MAC address 2222.2222.2222

If I need to find which ports on a switch will this particular frame forwarded, which IOS command shall I use ?

sh mac-address-table ??

Thanks guys, really appreciate the help !!!

Netstudent

redistribution can do alot of things. It can redistribute a static route throughout the network. Like if an edge router had a default route pointing to the internet, you could redistribute that default route to other routers so they know how to get out to the internet. It can redistribute routes among different autonomous systems as I have described in the "AS number Question revisted" post. It can redistribute routes from different routing protocols. IF you are just starting out in networking, then wait a little while before you tackle redistribution. It is a complex topic that takes much thought, especially in a production network. If you are not just starting out, then read the cisco whitepages on redistribution.

Welcome!

jlau2001

Thanks.

I will take a look on redistribution later. In fact I will have an exam on this thursday. now I am just revisit anything I had learned.

So for the MAC-address question that I mentioned before, I can use IOS command "show mac-address-table" to find out which particular port will forward, let see from 1111.1111.1111 to 2222.2222.2222 ???

NeonNoodle

jlau2001 wrote:

Thanks.

I will take a look on redistribution later. In fact I will have an exam on this thursday. now I am just revisit anything I had learned.

So for the MAC-address question that I mentioned before, I can use IOS command "show mac-address-table" to find out which particular port will forward, let see from 1111.1111.1111 to 2222.2222.2222 ???

Straight from the horse's mouth (for the Catalyst 2950)

show mac-address-table command

show mac-address-table 
Usage Guidelines 
This command displays the MAC address table for the switch. Specific views can be defined by using the optional keywords and values. If more than one optional keyword is used, all of the conditions must be true in order for that entry to appear. 

Expressions are case sensitive. For example, if you enter | exclude output, the lines that contain output do not appear, but the lines that contain Output appear. 

Examples 
This is an example of output from the show mac-address-table command: 

Switch> show mac-address-table
Dynamic Addresses Count:               9
Secure Addresses (User-defined) Count: 0
Static Addresses (User-defined) Count: 0
System Self Addresses Count:           41
Total MAC addresses:                   50
Non-static Address Table:
Destination Address  Address Type  VLAN  Destination Port
-------------------  ------------  ----  --------------------
0010.0de0.e289       Dynamic          1  FastEthernet0/1
0010.7b00.1540       Dynamic          2  FastEthernet0/5
0010.7b00.1545       Dynamic          2  FastEthernet0/5
0060.5cf4.0076       Dynamic          1  FastEthernet0/1
0060.5cf4.0077       Dynamic          1  FastEthernet0/1
0060.5cf4.1315       Dynamic          1  FastEthernet0/1
0060.70cb.f301       Dynamic          1  FastEthernet0/1
00e0.1e42.9978       Dynamic          1  FastEthernet0/1
00e0.1e9f.3900       Dynamic          1  FastEthernet0/1