Cisco IOS commands

[David Ibrahim]

pls i am confused on some Cisco IOS commands.
they are:
1.logging synchronous:what does it mean?
2.what does circuit numbers mean?
3.what is keepalive(clocking or framing)all about?
4.what is CSU/DSU as applied to DCE/DTE?
5. what is a TFTP server?what is its usefulness?

[Big Evil]

1.logging synchronous:what does it mean?
When the router wants you to know something, it wants you to know right now.

2.what does circuit numbers mean?
Line numbers/PSTN?

3.what is keepalive(clocking or framing)all about?
You can configure the keepalive time interval, which is the frequency
at which the Cisco IOS software sends messages to itself to ensure that a
network interface is alive.

4.what is CSU/DSU as applied to DCE/DTE?
A CSU/DSU (Channel Service Unit/Data Service Unit) is a digital-interface device used to connect a Data Terminal Equipment device or DTE, such as a router, to a digital circuit (for example a T1 or T3 line).

5. what is a TFTP server?what is its usefulness?
The Trivial File Transfer Protocol (TFTP) is normally used only for booting diskless workstations. The tftp-server package provides the server for TFTP, which allows users to transfer files to and from a remote machine

[crissa]

pls i am confused on some Cisco IOS commands.
they are:
1.logging synchronous:what does it mean?

Hello,
see <http://www.cisco.com/en/US/docs/ios/12_3/configfun/command/reference/cfr_1g04.html#wp1033117>.
I usually use it because it rebuilds the command or config line you are just typing after the out of log or debug information is finshed.

5. what is a TFTP server?what is its usefulness?

See <http://www.cisco.com/en/US/docs/ios/12_3/configfun/command/reference/cfr_1g12.html#wp1031522>.
We use this command at work when we have to upgrade (or downgrade) the IOS of a larger amount of accesspoints. First you copy the IOS for accesspoints to the router. On the accesspoints you copy it from the router after you setup the router as tftp server. This is helpful for sites with a low bandwidth to the internet.

HTH!
Bye, Tore

[vuyisa100]

pls i am confused on some Cisco IOS commands.
they are:
1.logging synchronous:what does it mean?
2.what does circuit numbers mean?
3.what is keepalive(clocking or framing)all about?
4.what is CSU/DSU as applied to DCE/DTE?
5. what is a TFTP server?what is its usefulness?
logging synchronous is used when you don't want to be interupted by status messages
e.g you are busy typing some configurations and a certain port goes down, the router will tell you immediately and it will disturb your typing. so logging synchronous is used to prevent that