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Table Of Contents
Using the EXEC Command Interpreter
Performing a Basic Interface Configuration
Configuring Framed and Unframed Mode
Configuring Timing (Clock) Signals
Configuring Cyclic Redundancy Checks
Using show Commands to Verify the New Interface Status
Using the show version or show hardware Commands
Using the show interfaces Command
Using the ping Command to Verify Network Connectivity
Configuring the PA-4E1G
To continue your PA-4E1G installation, you must configure the serial interfaces. The instructions that follow apply to all supported platforms. Minor differences between the platforms—with Cisco IOS software commands—are noted.
This chapter contains the following sections:
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Using the EXEC Command Interpreter
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Using the EXEC Command Interpreter
You modify the configuration of your router through the software command interpreter called the EXEC (also called enable mode). You must enter the privileged level of the EXEC command interpreter with the enable command before you can use the configure command to configure a new interface or to change the existing configuration of an interface. The system prompts you for a password if one has been set.
The system prompt for the privileged level ends with a pound sign (#) instead of an angle bracket (>). At the console terminal, use the following procedure to enter the privileged level:
Step 1
Router> enablePassword:Step 2
When you enter the correct password, the system displays the privileged-level system prompt (#):
Router#To configure the new interfaces, proceed to the "Configuring the Interfaces" section.
Configuring the Interfaces
After you verify that the new PA-4E1G is installed correctly (the enabled LED goes on), use the privileged-level configure command to configure the new interfaces. Have the following information available:
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If you installed a new PA-4E1G or if you want to change the configuration of an existing interface, you must enter configuration mode to configure the new interfaces. If you replaced a PA-4E1G that was previously configured, the system recognizes the new interfaces and brings them up in their existing configurations.
For a summary of the configuration options available and instructions for configuring interfaces on a PA-4E1G, refer to the appropriate configuration publications listed in the "Related Documentation" section.
You execute configuration commands from the privileged level of the EXEC command interpreter, which usually requires password access. Contact your system administrator, if necessary, to obtain password access. (See the "Using the EXEC Command Interpreter" section for an explanation of the privileged level of the EXEC.)
This section contains the following subsections:
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Shutting Down an Interface
Before you remove an interface that you will not replace, or replace port adapters, use the shutdown command to shut down (disable) the interfaces to prevent anomalies when you reinstall the new or reconfigured port adapter. When you shut down an interface, it is designated administratively down in the show command displays.
Follow these steps to shut down an interface:
Step 1
Step 2
Router# configure terminalEnter configuration commands, one per line. End with CNTL/Z.Router(config)#Step 3
When you have finished, press Ctrl-Z—hold down the Control key while you press Z—or enter end or exit to exit configuration mode and return to the EXEC command interpreter.
Table 4-1 shows the shutdown command syntax for the supported platforms.
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Step 4
Router# copy running-config startup-config[OK]Router#The system displays an OK message when the configuration has been stored in NVRAM.
Step 5
Table 4-2 provides examples of the show interfaces serial command for the supported platforms.
Step 6
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For complete descriptions of software configuration commands, refer to the publications listed in the "Related Documentation" section.
Performing a Basic Interface Configuration
Following are instructions for a basic configuration, which include enabling an interface and specifying IP routing. You might also need to enter other configuration subcommands, depending on the requirements for your system configuration and the protocols you plan to route on the interface. For complete descriptions of configuration subcommands and the configuration options available for serial interfaces, refer to the appropriate software documentation.
In the following procedure, press the Return key after each step unless otherwise noted. At any time you can exit the privileged level and return to the user level by entering disable at the prompt as follows:
Router# disableRouter>
Step 1
Router# configure terminalEnter configuration commands, one per line. End with CNTL/Z.Router(config)#Step 2
Table 4-3 gives examples of the interface serial subcommand for the supported platforms.
Step 3
Router(config-if)# ip address 10.0.0.0 10.255.255.255Step 4
Step 5
Step 6
Step 7
Step 8
Router# copy running-config startup-config[OK]Router#This completes the procedure for creating a basic configuration.
Customizing the Configuration
Use the privileged-level configure command to perform an advanced interface configuration. You will need the following information to perform this configuration:
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Caution
This section contains the following topics:
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Configuring Framed and Unframed Mode
The PA-4E1G supports both framed (G.704) and unframed (G.703) modes of operation; the default is unframed operation.
To enable framed operation, you must specify the start and stop slots, separated by a hyphen, as follows:
timeslot 0/start-slot-31/stop-slotFollowing is an example of using the timeslot command with a start slot of 1 and a stop slot of 13:
Router# timeslot 1-13Nonconfigurable combinations of start and stop slots will be ignored, and the interface will be left unchanged.
In framed mode, the system default is not to use time slot 16 for data. To use slot 16 for data, use the ts16 command in addition to the timeslot 1-17 command, as follows:
Router# timeslot 1-17Router# ts16To restore the system default, use the no ts16 command.
Configuring Timing (Clock) Signals
Each PA-4E1G operates either with an external clock signal that it recovers from the received data stream or its own internal clock signal. The default is the external clock source line.
To specify the clock source, use the clock source {line | internal} command.
To change the default and use the internal clock, use the clock source internal command.
To return the interface to the default state, use the clock source line command. (The no clock source internal command also returns the interface to the default state.)
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Configuring Cyclic Redundancy Checks
The 4-bit cyclic redundancy check (CRC4) is an error-checking technique that uses a calculated numeric value to detect errors in transmitted data. By default, CRC4 is not enabled. The sender of a data frame calculates the frame check sequence (FCS). Before it sends a frame, the sender appends the FCS value to the message. The receiver recalculates the FCS and compares its calculation to the FCS from the sender. If there is a difference between the two calculations, the receiver assumes that a transmission error occurred and sends a request to the sender to resend the frame.
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Table 4-4 summarizes cyclic redundancy check (CRC) commands.
Enable CRC4 using the crc 4 command. Before you can enable 4-bit CRC, you must use the interface serial command (followed by the interface address of the interface) to select the interface on which you want to enable 4-bit CRC. This command functions in the same way on all supported platforms.
In the example that follows, 4-bit CRC is specified:
Router(config-if)# crc 4The preceding command example applies to all systems in which the PA-4E1G is supported. Use the no crc 4 command to disable CRC4 and return the interface to the default CRC disabled setting.
When you have finished, press Ctrl-Z—hold down the Control key while you press Z—or enter end or exit to exit configuration mode and return to the EXEC command interpreter prompt. Then write the new configuration to NVRAM using the copy running-config startup-config command.
For command descriptions, refer to the Configuration Fundamentals Configuration Guide.
Checking the Configuration
After configuring the new interface, use the show commands to display the status of the new interface or all interfaces, and use the ping and loopback commands to check connectivity. This section includes the following subsections:
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Using show Commands to Verify the New Interface Status
Table 4-5 demonstrates how you can use the show commands to verify that new interfaces are configured and operating correctly and that the PA-4E1G appears in them correctly. Sample displays of the output of selected show commands appear in the sections that follow. For complete command descriptions and examples, refer to the publication listed in the "Related Documentation" section.
Note
If the interface is down and you configured it as up, or if the displays indicate that the hardware is not functioning properly, ensure that the interface is properly connected and terminated. If you still have problems bringing up the interface, contact a service representative for assistance. This section includes the following subsections:
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Using the show version or show hardware Commands
Display the configuration of the system hardware, the number and type of each interface type installed, the Cisco IOS software version, the names and sources of configuration files, and the boot images, using the show version (or show hardware) command.
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The following sections offer some platform-specific output examples using the show version command:
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Cisco 7100 Series Routers—Example Output of the show version Command
Following is an example of the show version command from a Cisco 7120 series router with a PA-4E1G installed:
Router# show versionCisco Internetwork Operating System SoftwareIOS (tm) EGR Software (c7100-IS-M), Version 12.0(4)XE, EARLY DEPLOYMENTRELEASE)TAC:Home:SW:IOS:Specials for infoCopyright (c) 1986-1999 by cisco Systems, Inc.Compiled Thu 10-Jun-99 15:32 by lindaImage text-base:0x60008900, data-base:0x60D8E000ROM:System Bootstrap, Version 12.0(19990720:023243)[gautham-conn_4xe-PRE_ALPHEBOOTFLASH:EGR Software (c7100-IS-M), Version 12.0(4)XE, EARLY DEPLOYMENTRELEA)Router uptime is 24 minutesSystem restarted by power-onSystem image file is "disk0:c7100-is-mz.120-4.XE"cisco 7120-bad (EGR) processor with 61440K/69632K bytes of memory.R527x CPU at 225Mhz, Implementation 40, Rev 10.0, 2048KB L2 CacheLast reset from power-onBridging software.G.703/E1 software, Version 1.0.G.703/JT2 software, Version 1.0.125K bytes of non-volatile configuration memory.40960K bytes of ATA PCMCIA card at slot 0 (Sector size 512 bytes).8192K bytes of Flash internal SIMM (Sector size 256K).Configuration register is 0x2000Cisco 7200 Series Routers, Cisco 7200 VXR Routers, and Cisco uBR7200 Series Routers—Example Output of the show version Command
Following is an example of the show version command from a Cisco 7200 series router with a PA-4E1G installed:
Router# show versionCisco Internetwork Operating System SoftwareIOS (c) 7200 Software (C7200-J-M), Version 11.1(7)CA [biff 105]Copyright (c) 1986-1996 by cisco Systems, Inc.Compiled Sun 04-Aug-96 06:00 by biffImage text-base: 0x600088A0, data-base: 0x605A4000ROM: System Bootstrap, Version 11.1(7)CA RELEASED SOFTWARERouter uptime is 4 hours, 22 minutesSystem restarted by reloadSystem image file is "c7200-j-mz", booted via slot0cisco 7206 (NPE150) processor with 12288K/4096K bytes of memory.R4700 processor, Implementation 33, Revision 1.0 (Level 2 Cache)Last reset from power-onLast reset from power-onG.703/E1 software, Version 1.0.G.703/JT2 software, Version 1.0.SuperLAT software copyright 1990 by Meridian Technology Corp).Bridging software.X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.TN3270 Emulation software (copyright 1994 by TGV Inc).Chassis Interface.4 Serial network interfaces.125K bytes of non-volatile configuration memory.1024K bytes of packet SRAM memory.20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).8192K bytes of Flash internal SIMM (Sector size 256K).Configuration register is 0x2Cisco 7201 Router—Example Output of the show version Command
Following is an example of the show version command from a Cisco 7201 router:
Router# show versionCisco IOS Software, 7200 Software (C7200P-ADVENTERPRISEK9-M), Version 12.4(biffDEV.061001), INTERIM SOFTWARE Copyright (c) 1986-2006 by Cisco Systems, Inc.Compiled Sun 01-Oct-06 23:42 by biffROM: System Bootstrap, Version 12.4(4r)XD5, RELEASE SOFTWARE (fc1)BOOTLDR: Cisco IOS Software, 7200 Software (C7200P-KBOOT-M), Version 12.4(TAZ3DEV.060927), INTERIM SOFTWAREc7201alpha1 uptime is 5 days, 18 hours, 32 minutes System returned to ROM by power-on System image file is "disk0:c7200p-adventerprisek9-mz.2006-10-01.biffdev"This product contains cryptographic features and is subject to United States and local country laws governing import, export, transfer and use. Delivery of Cisco cryptographic products does not imply third-party authority to import, export, distribute or use encryption.Importers, exporters, distributors and users are responsible for compliance with U.S. and local country laws. By using this product you agree to comply with applicable laws and regulations. If you are unable to comply with U.S. and local laws, return this product immediately.A summary of U.S. laws governing Cisco cryptographic products may be found at:http://www.cisco.com/wwl/export/crypto/tool/stqrg.htmlIf you require further assistance please contact us by sending email to export@cisco.com.Cisco 7201 (c7201) processor (revision A) with 917504K/65536K bytes of memory.Processor board ID 2222222222222MPC7448 CPU at 1666Mhz, Implementation 0, Rev 2.21 slot midplane, Version 2.255Last reset from power-on1 FastEthernet interface4 Gigabit Ethernet interfaces2045K bytes of NVRAM.62443K bytes of USB Flash usbflash0 (Read/Write)250880K bytes of ATA PCMCIA card at slot 0 (Sector size 512 bytes).65536K bytes of Flash internal SIMM (Sector size 512K).Configuration register is 0x2Cisco 7401ASR Router—Example Output of the show version Command
Following is an example of the show version command from a Cisco 7401ASR router with a PA-4E1G installed:
Router# show versionCisco Internetwork Operating System SoftwareIOS (tm) 7401ASR Software (C7401ASR-J-M), Version 11.1(7)CA [biff 105]Copyright (c) 1986-1996 by cisco Systems, Inc.Compiled Sun 04-Aug-96 06:00 by biffImage text-base: 0x600088A0, data-base: 0x605A4000ROM: System Bootstrap, Version 11.1(7)CA RELEASED SOFTWARERouter uptime is 4 hours, 22 minutesSystem restarted by reloadSystem image file is "c7401ASR-j-mz", booted via slot0cisco 7401ASR processor with 12288K/4096K bytes of memory.R4700 processor, Implementation 33, Revision 1.0 (Level 2 Cache)Last reset from power-onLast reset from power-onG.703/E1 software, Version 1.0.G.703/JT2 software, Version 1.0.SuperLAT software copyright 1990 by Meridian Technology Corp).Bridging software.X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.TN3270 Emulation software (copyright 1994 by TGV Inc).Chassis Interface.4 Serial network interfaces.125K bytes of non-volatile configuration memory.1024K bytes of packet SRAM memory.20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).8192K bytes of Flash internal SIMM (Sector size 256K).Configuration register is 0x2VIP in Cisco 7000 Series and Cisco 7500 Series Routers—Example Output of the show version Command
Following is an example of the show version command from a Cisco 7500 series routers with a PA-4E1G installed:
Router# show versionCisco Internetwork Operating System SoftwareIOS (tm) GS Software (RSP-JV-M), Version 11.1(14)CA [biff 184]Synced to mainline version: 11.1(13)Copyright (c) 1986-1998 by cisco Systems, Inc.Compiled Wed 08-Oct-98 00:37 by biffImage text-base: 0x600108A0, data-base: 0x609DC000ROM: System Bootstrap, Version 5.3(16645) [biff 571]ROM: GS Software (RSP-BOOT-M), Version 11.1(618) [biff 191]Router uptime is 3 hours, 14 minutesSystem restarted by reloadSystem image file is "biff/rsp-jv-mz.g703", booted via tftp from 1.1.1.253cisco RSP2 (R4600) processor with 32768K bytes of memory.R4600 processor, Implementation 32, Revision 2.0Last reset from power-onG.703/E1 software, Version 1.0.G.703/JT2 software, Version 1.0.SuperLAT software copyright 1990 by Meridian Technology Corp).Bridging software.X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.TN3270 Emulation software (copyright 1994 by TGV Inc).Chassis Interface.1 VIP2 controllers (4 Serial).4 Serial network interfaces.125K bytes of non-volatile configuration memory.16384K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).8192K bytes of Flash internal SIMM (Sector size 256K).No slave installed in slot 7.Configuration register is 0x2Using the show diag Command
Display the types of port adapters installed in your system (and specific information about each) using the show diag slot command, where slot is the port adapter slot in a Cisco 7100 series router, Cisco 7200 series router, Cisco 7200 VXR router, Cisco uBR7200 series router, Cisco 7201 router, Cisco 7301 router, and Cisco 7401ASR router, the module slot in a Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 7304 router, and the interface processor slot in a Cisco 7000 series router or Cisco 7500 series router with a VIP.
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The following sections offer some platform-specific output examples using the show diag command:
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Cisco 7100 Series Routers—Example Output of the show diag Command
Following is an example of the show diag command that shows a PA-4E1G installed in port adapter slot 3 of a Cisco 7120 series router:
Router# show diag 3Slot 3:Mx serial (ME1-UNBAL) port adapter, 4 portsIntegrated port adapter is analyzedEEPROM contents at hardware discovery:Hardware revision 255.255 Board revision UNKNOWNEEPROM format version 1EEPROM contents (hex):0x20:01 D3 FF FF FF FF FF FF FF FF FF FF FF FF FF FF0x30:FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
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Cisco 7200 Series Routers, Cisco 7200 VXR Routers, and Cisco uBR7200 Series Routers—Example Output of the show diag Command
Following is an example of the show diag command that shows a PA-4E1G installed in port adapter slot 6 of a Cisco 7200 series router:
Router# show diag 6Slot 6:Mx serial (ME1-UNBAL) port adapter, 4 portsPort adapter is analyzedPort adapter insertion time 00:48:28 agoHardware revision 255.255 Board revision UNKNOWNSerial number 4294967295 Part number 255-65535-255Test history 0xFF RMA number 255-255-255EEPROM format version 255EEPROM contents (hex):0x20: FF 41 FF FF FF FF FF FF FF FF FF FF FF FF FF FF0x30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FFCisco 7201 Router—Example Output of the show diag Command
Following is an example of the show diag command from a Cisco 7201 router:
Router# show diag 1Slot 1:Dual OC3 POS Port adapter, 2 portsPort adapter is analyzedPort adapter insertion time 00:02:19 agoEEPROM contents at hardware discovery:Hardware Revision : 1.0PCB Serial Number : JAE07520DYLPart Number : 73-8220-02Board Revision : A0RMA Test History : 00RMA Number : 0-0-0-0RMA History : 00Deviation Number : 0Product (FRU) Number : PA-POS-2OC3Top Assy. Part Number : 800-21857-02EEPROM format version 4EEPROM contents (hex):0x00: 04 FF 40 03 E3 41 01 00 C1 8B 4A 41 45 30 37 350x10: 32 30 44 59 4C 82 49 20 1C 02 42 41 30 03 00 810x20: 00 00 00 00 04 00 88 00 00 00 00 CB 94 50 41 2D0x30: 50 4F 53 2D 32 4F 43 33 20 20 20 20 20 20 20 200x40: 20 C0 46 03 20 00 55 61 02 FF FF FF FF FF FF FF0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FFCisco 7401ASR Router—Example Output of the show diag Command
Following is an example of the show diag command that shows a PA-4E1G installed in port adapter slot 1 of a Cisco 7401ASR router:
Router# show diag 1Slot 1:Mx serial (ME1-UNBAL) port adapter, 4 portsPort adapter is analyzedPort adapter insertion time 00:48:28 agoHardware revision 255.255 Board revision UNKNOWNSerial number 4294967295 Part number 255-65535-255Test history 0xFF RMA number 255-255-255EEPROM format version 255EEPROM contents (hex):0x20: FF 41 FF FF FF FF FF FF FF FF FF FF FF FF FF FF0x30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FFVIP in Cisco 7000 Series Routers and Cisco 7500 Series Routers—Example Output of the show diag Command
Following is an example of the show diag command that shows a PA-4E1G installed in port adapter slot 1 of a VIP2 in interface processor slot 9:
Router# show diag 9Slot 9:Physical slot 9, ~physical slot 0x6, logical slot 9, CBus 0Microcode Status 0x4Master Enable, LED, WCS LoadedBoard is analyzedPending I/O Status: NoneEEPROM format version 1VIP2 controller, HW rev 2.3, board revision A0Serial number: 03515977 Part number: 73-1684-03Test history: 0x00 RMA number: 00-00-00Flags: cisco 7000 board; 7500 compatibleEEPROM contents (hex):0x20: 01 15 02 03 00 35 A6 49 49 06 94 03 00 00 00 000x30: 50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00Slot database information:Flags: 0x4 Insertion time: 0x3C68 (03:16:49 ago)Controller Memory Size: 16 MBytes DRAM, 1024 KBytes SRAMPA Bay 1 Information:G703 Serial PA, 4 portsEEPROM format version 255HW rev FF.FF, Board revision UNKNOWNSerial number: 4294967243 Part number: 255-65535-255Using the show interfaces Command
Display status information (including the physical slot and interface address) for the interfaces you specify using the show interfaces command.
For complete descriptions of interface subcommands and the configuration options available the individual platforms, refer to the publications listed in the "Related Documentation" section.
Note
The following sections provide some platform-specific output examples using the show interfaces command:
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Cisco 7100 Series Routers—Example Output of the show interfaces Command
Following are examples of the show interfaces serial command used with a Cisco 7120 series router and a Cisco 7140 series router.
In these examples, the four serial interfaces (0 to 3) are on a port adapter in port adapter slot 3 of a Cisco 7120 series router; also, most of the status information for each interface is omitted. (Interfaces are administratively shut down until you enable them.)
Router# show interfaces serial 3/0Serial3/0 is up, line protocol is upHardware is 4ME1-UNBALInternet address is 10.0.0.0MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive set (10 sec)[Additional display text omitted from this example]Router# show interfaces serial 3/1Serial3/1 is up, line protocol is upHardware is 4ME1-UNBALInternet address is 10.0.0.1MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive set (10 sec)[Additional display text omitted from this example]Router# show interfaces serial 3/2Serial3/2 is up, line protocol is upHardware is 4ME1-UNBALInternet address is 10.0.0.2MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive set (10 sec)[Additional display text omitted from this example]Router# show interfaces serial 3/3Serial3/3 is up, line protocol is upHardware is 4ME1-UNBALInternet address is 10.0.0.3MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive set (10 sec)[Additional display text omitted from this example]
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Following is an example of the show interfaces serial command, which shows all of the information specific to interface 0 on a PA-4E1G installed in port adapter slot 3 of a Cisco 7120 series router:
Router# show interfaces serial 3/0Serial3/0 is up, line protocol is upHardware is 4ME1-UNBALMTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive set (10 sec)Last input never, output 1d17h, output hang neverLast clearing of "show interface" counters neverOutput queue 0/40, 0 drops; input queue 0/75, 0 drops5 minute input rate 0 bits/sec, 0 packets/sec5 minute output rate 0 bits/sec, 0 packets/sec0 packets input, 0 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort24 packets output, 5137 bytes, 0 underruns0 output errors, 0 collisions, 0 interface resets0 output buffer failures, 0 output buffers swapped out0 carrier transitions DCD=down DSR=down DTR=down RTS=down CTS=down
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Cisco 7200 Series Routers, Cisco 7200 VXR Routers, and Cisco uBR7200 Series Routers—Example Output of the show interfaces Command
Following are examples of the show interfaces serial command for Cisco 7200 series routers, Cisco 7200 VXR routers, and Cisco uBR7200 series routers. In these examples, the four serial interfaces (0 to 3) are on a port adapter in port adapter slot 1; also, most of the status information for each interface is omitted. (Interfaces are administratively shut down until you enable them.)
Router# show interfaces serial 1/0Serial1/0 is up, line protocol is upHardware is 4ME1-UNBALInternet address is 10.0.0.0MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive not set\[Additional display text omitted from this example]Router# show interfaces serial 1/1Serial1/1 is up, line protocol is upHardware is 4ME1-UNBALInternet address is 10.0.0.1MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive not set\[Additional display text omitted from this example]Router# show interfaces serial 1/2Serial1/2 is up, line protocol is upHardware is 4ME1-UNBALInternet address is 10.0.0.2MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive not set\[Additional display text omitted from this example]Router# show interfaces serial 1/3Serial1/3 is up, line protocol is upHardware is 4ME1-UNBALInternet address is 10.0.0.3MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive not set\[Additional display text omitted from this example]Following is an example of the show interfaces serial command, which shows all of the information specific to interface port 0 on a PA-4E1G installed in port adapter slot 1:
Router# show interfaces serial 1/0Serial1/0 is up, line protocol is upHardware is 4ME1-UNBALInternet address is 5.0.0.2/8MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive not setLast input 00:00:00, output never, output hang neverLast clearing of "show interface" counters 00:32:21Input queue: 0/75/0 (size/max/drops); Total output drops: 0Queueing strategy: weighted fairOutput queue: 0/64/0 (size/threshold/drops)Conversations 0/0 (active/max active)Reserved Conversations 0/0 (allocated/max allocated)5 minute input rate 0 bits/sec, 0 packets/sec5 minute output rate 0 bits/sec, 0 packets/sec33 packets input, 10824 bytes, 0 no bufferReceived 66 broadcasts, 0 runts, 0 giants0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort0 packets output, 0 bytes, 0 underruns0 output errors, 0 collisions, 0 interface resets0 output buffer failures, 0 output buffers swapped out0 carrier transitions0 alarm indications, 0 remote alarms, 0 rx LOF, 0 rx LOSDCD up, BER inactive, NELR inactive, FELR inactiveCisco 7201 Router—Example Output of the show interfaces Command
Following is an example of the show interfaces command for a Cisco 7201 router:
Router# show interfacesGigabitEthernet0/0 is up, line protocol is upHardware is MV64460 Internal MAC, address is 0019.56c5.2adb (bia0019.56c5.2adb)Internet address is 209.165.200.225MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,reliability 255/255, txload 1/255, rxload 45/255Encapsulation ARPA, loopback not setKeepalive set (10 sec)Full-duplex, 1000Mb/s, media type is RJ45output flow-control is XON, input flow-control is XONARP type: ARPA, ARP Timeout 04:00:00Last input 00:07:03, output 00:00:07, output hang neverLast clearing of "show interface" counters 00:00:04Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0Queueing strategy: fifoOutput queue: 0/40 (size/max)5 minute input rate 180240000 bits/sec, 430965 packets/sec5 minute output rate 0 bits/sec, 0 packets/sec2222975 packets input, 133378500 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants, 0 throttles0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored0 watchdog, 0 multicast, 0 pause input0 input packets with dribble condition detected0 packets output, 0 bytes, 0 underruns0 output errors, 0 collisions, 0 interface resets0 babbles, 0 late collision, 0 deferred0 lost carrier, 0 no carrier, 0 pause output0 output buffer failures, 0 output buffers swapped outCisco 7401ASR Router—Example Output of the show interfaces Command
Following is an example of the show interfaces serial command for a Cisco 7401ASR router. This example shows all of the information specific to interface port 0 on a PA-4E1G installed in port adapter slot 1:
Router# show interfaces serial 1/0Serial1/0 is up, line protocol is upHardware is 4ME1-UNBALInternet address is 5.0.0.2/8MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive not setLast input 00:00:00, output never, output hang neverLast clearing of "show interface" counters 00:32:21Input queue: 0/75/0 (size/max/drops); Total output drops: 0Queueing strategy: weighted fairOutput queue: 0/64/0 (size/threshold/drops)Conversations 0/0 (active/max active)Reserved Conversations 0/0 (allocated/max allocated)5 minute input rate 0 bits/sec, 0 packets/sec5 minute output rate 0 bits/sec, 0 packets/sec33 packets input, 10824 bytes, 0 no bufferReceived 66 broadcasts, 0 runts, 0 giants0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort0 packets output, 0 bytes, 0 underruns0 output errors, 0 collisions, 0 interface resets0 output buffer failures, 0 output buffers swapped out0 carrier transitions0 alarm indications, 0 remote alarms, 0 rx LOF, 0 rx LOSDCD up, BER inactive, NELR inactive, FELR inactiveVIP in Cisco 7000 Series Routers or Cisco 7500 Series Routers—Example Output of the show interfaces Command
Following are examples of the show interfaces serial command used with the VIP2. In these examples, the four serial interfaces (0 to 3) are on a port adapter in port adapter slot 1 of a VIP2 in interface processor slot 3; also, most of the status information for each interface is omitted. (Interfaces are administratively shut down until you enable them.)
Router# show interfaces serial 3/1/0Serial3/1/0 is up, line protocol is upHardware is cyBus SerialInternet address is 10.0.0.0MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive not set[Additional display text omitted from this example]Router# show interfaces serial 3/1/1Serial3/1/1 is up, line protocol is upHardware is cyBus SerialInternet address is 10.0.0.1MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive not set[Additional display text omitted from this example]Router# show interfaces serial 3/1/2Serial3/1/2 is up, line protocol is upHardware is cyBus SerialInternet address is 10.0.0.2MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive not set[Additional display text omitted from this example]Router# show interfaces serial 3/1/3Serial3/1/3 is up, line protocol is upHardware is cyBus SerialInternet address is 10.0.0.3MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive not set[Additional display text omitted from this example]Following is an example of the show interfaces serial command, which shows all of the information specific to interface 0 on a port adapter in port adapter slot 1 of a VIP2 in interface processor slot 3:
Router# show interfaces serial 3/1/0Serial3/1/0 is up, line protocol is upHardware is cyBus SerialInternet address is 10.0.0.3MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive not setLast input 00:44:43, output 00:00:54, output hang neverLast clearing of "show interface" counters 01:53:04Queueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 drops5 minute input rate 0 bits/sec, 0 packets/sec5 minute output rate 0 bits/sec, 0 packets/sec2 packets input, 140 bytes, 0 no bufferReceived 2 broadcasts, 0 runts, 0 giants0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort113 packets output, 37064 bytes, 0 underruns0 output errors, 0 collisions, 1 interface resets0 output buffer failures, 0 output buffers swapped out6 carrier transitions0 alarm indications, 0 remote alarms, 0 rx LOF, 0 rx LOSDCD up, BER inactive, NELR inactive, FELR inactiveProceed to the next section "Using the ping Command to Verify Network Connectivity" to check network connectivity of the PA-4E1G and switch or router.
Using the ping Command to Verify Network Connectivity
Using the ping command, you can verify that an interface port is functioning properly. This section provides a brief description of the ping command. Refer to the publications listed in the "Related Documentation" section for detailed command descriptions and examples.
The ping command sends echo request packets out to a remote device at an IP address that you specify. After sending an echo request, the system waits a specified time for the remote device to reply. Each echo reply is displayed as an exclamation point (!) on the console terminal; each request that is not returned before the specified timeout is displayed as a period (.). A series of exclamation points (!!!!!) indicates a good connection; a series of periods (.....) or the messages [timed out] or [failed] indicate a bad connection.
Following is an example of a successful ping command to a remote server with the address 10.0.0.10:
Router# ping 10.0.0.10 <Return>Type escape sequence to abort.Sending 5, 100-byte ICMP Echoes to 10.0.0.10, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 1/15/64 msRouter#If the connection fails, verify that you have the correct IP address for the destination and that the device is active (powered on); then repeat the ping command.
Proceed to the next section "Using loopback Commands," to finish checking network connectivity.
Using loopback Commands
With the loopback test, you can detect and isolate equipment malfunctions by testing the connection between the PA-4E1G interface and a remote device such as a modem or CSC/DSU. The loopback subcommand places an interface in loopback mode, which enables test packets that are generated from the ping command to loop through a remote device or compact serial cable. If the packets complete the loop, the connection is good. If not, you can isolate a fault to the remote device or compact serial cable in the path of the loopback test.
The E1-G.703/G.704 interface supports the same local loopback test as other (data communications) interfaces. Using the loopback functions, you can check the integrity of the physical data path between the motherboard (or chassis system) and the PA-4E1G with the loopback command. The loopback signal follows this path regardless of whether or not a cable is attached to the port.
Figure 4-1 shows the signal path of the loopback function. The no loopback command disables all loopback tests on the interface.
Note
Figure 4-1 Loopback Path
