PA-E3 and PA-2E3 Serial Port Adapter Description The PA-E3 and PA-2E3 serial port adapters are available on Cisco 7200 series routers, on Cisco 7500 series routers, and on Cisco 7000 series routers with the 7000 Series Route Switch Processor (RSP7000) and 7000 Series Chassis Interface (RSP7000CI). These port adapters provide one (PA-E3) or two (PA-2E3) high-speed full-duplex synchronous serial E3 interfaces and integrated data service unit (DSU) functionality.
Configuration Tasks Configuration Tasks Perform the tasks in the following sections to configure the PA-E3 (all tasks are optional except for the first task): • • • Configure the PA-E3 Port Adapter Troubleshoot the PA-E3 Port Adapter Monitor and Maintain the PA-E3 Port Adapter For PA-E3 port adapter configuration examples, see the “Configuration Example” section, later in this chapter. The PA-E3 supports most interface commands.
Configuration Tasks Task Command Change the DSU mode. To connect to another PA-E3 port adapter or a Digital Link DSU, use the default mode (0). To connect to a Kentrox DSU, use mode 1. dsu mode {0 | 1} Change the framing used by the interface. framing {g751 | bypass} Change the international bit used by the interface. international bit {0 | 1} {0 | 1} Invert the data stream on the interface. invert data Change the national bit used by the interface.
Configuration Example Configuration Example The following example shows a typical configuration for serial interface 1/0/0 on a PA-E3 serial port adapter in a Cisco 7500 series router. The dsu bandwidth command reduces the bandwidth by padding the E3 frame, the dsu mode command enables and improves interoperability with other DSUs, and the national bit command sets Bit 12 in the E3 frame to 1. router# configure terminal router(config)# interface serial 1/0/0 router(config-if)# ip address 1.1.1.10 255.255.
Command Reference clock source (interface) To control which clock a G.703 E1 interface, an E1-G.703/G.704 serial port adapter, or a PA-E3 serial port adapter will use to clock its transmitted data from, use the clock source interface configuration command. To restore the default value, use the no form of this command. clock source {internal | line} no clock source Syntax Description internal Specifies that the interface will clock its transmitted data from its internal clock.
Command Reference dsu bandwidth To specify the maximum allowable bandwidth used by the PA-E3 port adapter, use the dsu bandwidth interface configuration command. To return to the default bandwidth, use the no form of this command. dsu bandwidth kbps no dsu bandwidth Syntax Description kbps Maximum bandwidth in the range of 22 kbps to 34010 kbps. The default is 34010 kbps. Default 34010 kbps Command Mode Interface configuration Usage Guidelines This command first appeared in Cisco IOS Release 11.1 CA.
Command Reference dsu mode To specify the interoperability mode used by the PA-E3 port adapter, use the dsu mode interface configuration command. To return to the default mode, use the no form of this command. dsu mode {0 | 1} no dsu mode Syntax Description 0 Sets the interoperability mode to 0. This is the default. Specify mode 0 to connect the PA-E3 port adapter to another PA-E3 port adapter or to a Digital Link DSU (DL3100). 1 Sets the interoperability mode to 1.
Command Reference framing To specify E3 line framing used by the PA-E3 port adapter, use the framing interface configuration command. To return to the default G.751 framing, use the no form of this command. framing {bypass | g751} no framing Syntax Description bypass Specifies bypass E3 framing. g751 Specifies G.751 E3 framing. This is the default. Default G.751 framing Command Mode Interface configuration Usage Guidelines This command first appeared in Cisco IOS Release 11.1 CA.
Command Reference international bit To set the E3 international bit in the G.751 frame used by the PA-E3 port adapter, use the international bit interface configuration command. To return to the default international bit, use the no form of this command. international bit {0 | 1} {0 | 1} no international bit Syntax Description 0|1 Specifies the value of the first international bit in the G.751 frame. The default is 0. 0|1 Specifies the value of the second international bit in the G.751 frame.
Command Reference invert data To invert the data stream, use the invert data interface configuration command. This command applies only to the Cisco 7000 series routers with the RSP7000 and RSP7000CI, Cisco 7200 series routers, and Cisco 7500 series routers. To disable this feature, use the no form of this command. invert data no invert data Syntax Description This command has no arguments or keywords. Default Data is not inverted.
Command Reference loopback To loop the serial interface on a PA-E3 port adapter, use the loopback interface configuration command. To remove the loopback, use the no form of this command. loopback {dte | local | network {line | payload}} no loopback Syntax Description dte Sets the loopback after the LIU toward the terminal. local Sets the loopback after going through the framer toward the terminal.
Command Reference national bit To set the E3 national bit in the G.751 frame used by the PA-E3 port adapter, use the national bit interface configuration command. To return to the default E3 national bit, use the no form of this command. national bit {0 | 1} no national bit Syntax Description 0|1 Specifies the E3 national bit in the G.751 frame. The default is 0. Default 0 national bit Command Mode Interface configuration Usage Guidelines This command first appeared in Cisco IOS Release 11.1 CA.
Command Reference scramble To enable scrambling of the payload on the PA-E3 port adapter, use the scramble interface configuration command. To disable scrambling, use the no form of this command. scramble no scramble Syntax Description This command has no keywords and arguments. Default Scrambling is disabled. Command Mode Interface configuration Usage Guidelines This command first appeared in Cisco IOS Release 11.1 CA. E3 scrambling is used to assist clock recovery on the receiving end.
Command Reference show controllers serial Use the show controllers serial privileged EXEC command to display information that is specific to the interface hardware. show controllers serial [slot/port] show controllers serial [slot/port-adapter/port] (Cisco 7500 series and Cisco 7000 series routers with the RSP7000 and RSP7000CI) Syntax Description slot (Optional) Slot number of the interface. port (Optional) Port number on the interface. The port value is always 0.
Command Reference mxt_ds=0x608BA654, rx ring entries=128, tx ring entries=256 rxring=0x4B01F480, rxr shadow=0x6081081C, rx_head=26 txring=0x4B01F960, txr shadow=0x60810E48, tx_head=192, tx_tail=192, tx_count=0 throttled=0, enabled=0, disabled=0 rx_no_eop_err=0, rx_no_stp_err=0, rx_no_eop_stp_err=0 rx_no_buf=0, rx_soft_overrun_err=0, dump_err= 1 tx_underrun_err=0, tx_soft_underrun_err=0, tx_limited=0 tx_fullring=0, tx_started=11504 Framing is g751, Clock Source is Line, Bandwidth limit is 34010.
Command Reference show diag To display hardware information for an interface, use the show diag privileged EXEC command on Cisco 7500 series routers. show diag [slot] Syntax Description slot (Optional) Slot number of the interface. Command Mode Privileged EXEC Usage Guidelines This command first appeared in Cisco IOS Release 11.1 CA. Use this command to determine the type of port adapter installed on a VIP2 in your router.
Command Reference show interfaces serial To display information about a serial interface, use the show interfaces serial privileged EXEC command. show interfaces serial [slot/port] (Cisco 7200 series) show interfaces serial [slot/port-adapter/port] (Cisco 7500 series and Cisco 7000 series with the RSP7000 and RSP7000CI) Syntax Description slot (Optional) Slot number of the interface. port (Optional) Port number on the interface. The port value is always 0.
Command Reference Table 2 describes significant fields shown in the display. Table 2 Show Interfaces Serial Field Descriptions Field Description Serial... is {up | down} ...is administratively down Indicates whether the interface hardware is currently active (whether carrier detect is present), inactive, or has been taken down by an administrator.
Command Reference Table 2 Show Interfaces Serial Field Descriptions (Continued) Field Description 5 minute input rate Average number of bits and packets transmitted per second in the last 5 minutes. 5 minute output rate The 5-minute input and output rates should be used only as an approximation of traffic per second during a given 5-minute period. These rates are exponentially weighted averages with a time constant of 5 minutes.
Supported MIB Table 2 Show Interfaces Serial Field Descriptions (Continued) Field Description output errors Sum of all errors that prevented the final transmission of datagrams out of the interface being examined. Note that this might not balance with the sum of the enumerated output errors, as some datagrams might have more than one error, and others might have errors that do not fall into any of the specifically tabulated categories.