![]() These two methods are referred to as Auto NAT and Manual NAT.The syntax for both makes use of a construct known as an object.The configuration of objects involve the keywords real and mapped. Issue a ping from Router-A to Router-B to test network connectivity between the two routers. There are two sets of syntax available for configuring address translation on a Cisco ASA. Check IP connectivity between the two routers using the ping command. %LINK-5-CHANGED: Interface Serial0/0/0, changed state to upģ. The link becomes up as both routers are correctly configured. Last input never, output never, output hang neverįinally, configure HDLC encapsulation and IP address on Router-A serial 0/0/0 interface. Reliability 255/255, txload 1/255, rxload 1/255Įncapsulation HDLC, loopback not set, keepalive set (10 sec) Serial0/0/0 is up, line protocol is up (connected) The show interfaces serial 0/0/0 confirms that HDLC encapsulation is enabled on the interface : Encapsulation HDLC, loopback not set, keepalive set (10 sec) Router-B#show interfaces serial 0/0/0 Packet Tracer 7.1. Don't forget to enable the interface with a no shutdown command. Router-B beeing the DCE side of the serial link, the 192.168.1.5/30 IP address is configured on Router-B serial 0/0/0 interface. The encapsulation hdlc configures HDLC protocol on the serial interface. Then, configure HDLC encapsulation and IP address on Router-B serial 0/0/0 interface. Router-B beeing the DCE, clock rate has to be configured on Router-B serial 0/0/0 interface Router-B(config)#interface serial 0/0/0 Configure the routers with the following parameters In this example, Router-A is the DTE side, and Router-B the DCE side (DCE V.35, clock rate set). The show controllers command is used to determine which side of the cable is the DCE side. Use the connected laptops to find the DCE and DTE routers The clock rate command in the interface configuration mode enables the router at the DCE end of the cable to provide the clock signal for the serial link. This clock is received by the DTE device. With a back-to-back serial connection, the ISR router connected to the DCE end of the serial cable provides the clock signal for the serial link. However, to change the encapsulation back to HDLC from PPP, use the following command from interface configuration mode: Router(config-if)#encapsulation hdlc HDLC is the default encapsulation on serial links in a Cisco router. PPP has to be used when communicating with non-Cisco devices. ![]() This field makes it possible for a single serial link to accommodate multiple network-layer protocols.Ĭisco’s HDLC is a point-to-point protocol that can only be used on serial links or leased lines between two Cisco devices. Because the standardized HDLC cannot support multiple protocols on a single link (lack of a mechanism to indicate which protocol is carried), Cisco developped a proprietary version of HDLC, called cHDLC, with a proprietary field acting as a protocol field. HDLC is a data link protocol used on synchronous serial data links. ![]()
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