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Written by CiscoNET
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Here is most of important configuration for emergency backdoor link thru AUX port. As a network support engineer, it would be number 1 configuration stuff need to memorize and use it all the time.
Once your client said my network is down, especially WAN link, what you can do in remote ?. Drive or flight ? Oh man you know how you feel.
Cisco devices provide AUX port to save your time and job position(?). Buyging cheap modem and set this one up. It would release a lot of worries and fears(?).
Let see check the below.
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Written by CiscoNET
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PPP is industry standard, very good protocol. It supports most of connection types.
- Authentication
- Compression
- mppc (microsoft point to point compression)
- Predictor (If you have enough memory than CPU power)
- Stac (If you have enough power of CPU than memory)
- Multilink
- Call Back
- Multi-protocol Encapsulation, IPCP, IPXCP, CDPCP and etc
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Written by CiscoNET
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Yes, it is cisco propritary protocol. B/C Cisco add nice feature on it. So, it won't comparible with other generic HDLC protocol. What features are added ? - Keepalive
- SLARP (Serial Link Address Resolution Protocol)
- Compression
- Performance (header 7-12)
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Written by CiscoNET
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If DSU mode is not matched with other side, it might cuase intermittent error or synchonization issue. You must know what type of DSU is connected to the remote port to determine if it interoperates with an E3 or T3 controller or a PA-E3 or PA-T3 port adapter. To improves interoperability, The local interface configuration must match the remote interface configuration. For example, if you define the data service unit (DSU) interoperability mode as 1 on the local port, you must also do the same on the remote port. |
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Written by Chris
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WAN 
