#IP OVER SERIAL SERIAL#
#IP OVER SERIAL SERIES#

LCP uses echo requests and responses to monitor the continuing availability of the link. PPP also provides a Link Control Protocol (LCP) for negotiating properties of the link.

#IP OVER SERIAL SERIAL#

PPP is a standard protocol used to send data over synchronous serial links. When the encapsulation on a serial interface is changed from HDLC to any other encapsulation type, the configured serial subinterfaces on the main interface inherit the newly changed encapsulation and they do not get deleted.Ĭisco HDLC uses keepalives to monitor the link state, as described in the “Keepalive Timer” section. Note Cisco HDLC is the default encapsulation type for the serial interfaces. Cisco HDLC is the default for data encapsulation at Layer 2 (data link) of the Open System Interconnection (OSI) stack for efficient packet delineation and error control. Cisco HDLC also provides a simple control protocol called Serial Line Address Resolution Protocol (SLARP) to maintain serial link keepalives. To configure serial interfaces, you should understand the following concept:Ĭisco High-Level Data Link Controller (HDLC) is the Cisco proprietary protocol for sending data over synchronous serial links. Information About Configuring Serial Interfaces

Indicates that loopback is not configured. Indicates that the hardware loopback status is configured on the serial interface. Indicates the interface status and shows that line protocol is up. Table 4-2 LEDs on the Serial WAN Module LED Name

#IP OVER SERIAL SERIES#

Table 4-2 describes the LEDs on the Cisco 800M series serial WAN module. Table 4-1 Smart Serial Cabling for Cisco 800M Series ISRs Product Number Information about the cables supported by Cisco 800M Series ISRs are provided in Table 4-1. Supports asynchronous speed of up to 115.2 kbpsĬisco 800M Series ISRs use Cisco smart serial connectors.Supports synchronous speed of up to 8 Mbps.Supports the following serial protocols.Supports the following encapsulations :.The features supported by the single-port serial module on Cisco 800M Series ISR is given as follows: Serial module in slot 0 and serial module in slot 1.3G module in slot 0 and serial module in slot 1.

Serial module in slot 0 and 3G module in slot 1.

The Cisco 800M Series ISR has 2 WAN slots that can host single-port serial module or multi-mode 3G module and supports the following combinations. The Cisco 800M Series ISR supports both synchronous and asynchronous modes of communication. The Cisco 800M Series Integrated Services Router (ISR) provides serial WAN connectivity to remote sites using Cisco High-Level Data Link Control (HDLC), Point-to-Point Protocol (PPP), or Frame Relay encapsulation through the pluggable, serial WAN interface module.

Information About Configuring Serial Interfaces.

I won't hesitate to use this - unless you think your field support would not be able to keep the newer technology working, in which case phasing it in slowly makes the most sense.This chapter describes configuring the serial interface for Cisco 800M Series ISRs in the following sections: I still doubt you'll see large numbers of DNP3 RTU with Ethernet ports, but you should see more DNP3 use related to Ethernet and TCP/IP.

Instead they are moving to a more abstract TCP/IP system that works by 'magic' - hiding the details of the various media. I mean, 100 meters (without resorting to fiber optics) is a pretty small 'power grid'.īut large users are moving away from a dozen flavors of direct serial links (ie: radio mode, dial-up, private-wire, leased-line, RS-232-to-satalitte, RS-232-to-Cellular, etc). I think the main reason you don't see much direct use of DNP3 on Ethernet is it was kind of designed for a widely distributed equipment. Digi has lots of customers using 'Ethernet-to-Serial' technology to tunnel DNP3's serial format through Ethernet and wide-area-network TCP/IP.

Ip over serial