Table Of Contents
PA-A1-OC3MM and PA-A1-OC3SM ATM Port Adapters
PA-A1-OC3MM and PA-A1-OC3SM ATM Port Adapters
Description
Asynchronous Transfer Mode (ATM) port adapters (PA-A1-OC3MM and PA-A1-OC3SM) are available on Cisco 7200 series routers, on the second-generation Versatile Interface Processor (VIP2) in Cisco 7500 series routers, and in Cisco 7000 series routers with the 7000 Series Route Switch Processor (RSP7000) and 7000 Series Chassis Interface (RSP7000CI).
The ATM port adapter provides a single SONET/SDH OC-3 full-duplex interface (either multimode or single-mode intermediate reach) and supports data rates of up to 155 Mbps bidirectionally. The ATM port adapter connects to a SONET/SDH multimode or SONET/STC-3C single-mode optical fiber cable (STS-3C or STM-1 physical layer) to connect the router to an external DSU (an ATM network). The ATM port adapter supports the following features:
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Segmentation and Reassembly (SAR) of up to 512 buffers simultaneously, where each buffer represents a packet
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Platforms
This feature is supported on these platforms:
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Configuration Tasks
For information on how to configure the PA-A1-OC3MM and PA-A1-OC3SM ATM interfaces, refer to the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide.
Because the ATM port adapter does not support traffic shaping, the peak, average, and burst rate options for the atm pvc interface configuration command are not available.
For information on other commands that can be used by the PA-A1-OC3MM and PA-A1-OC3SM ATM interfaces, refer to the Cisco IOS Release 11.2 configuration guides.
Configuration Examples
The examples in this section show the configuration needed to connect two ATM port adapters back to back. Two routers, each containing an ATM port adapter, can be connected directly with a standard cable, which allows you to verify the operation of the ATM port or to directly link the routers to build a larger node.
By default, the ATM port adapter expects a connected ATM switch to provide transmit clocking. To specify that the ATM port adapter generates the transmit clock internally for SONET PLIM operation, add the atm clock internal command to your configuration.
Note
The following example shows the configuration file commands for two Cisco 7200 series routers connected through their SONET interface. For additional ATM examples, refer to the "Cisco 7000 Family Configuration Examples" section in the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide.
First router:
interface ATM3/0ip address 192.168.1.10 255.0.0.0no keepalivemap-group atm-inatm clock internalatm pvc 1 1 5 aal5snap!map-list atm-inip 192.168.1.20 atm-vc 1 broadcastSecond router:
interface ATM3/0ip address 192.168.1.20 255.0.0.0no keepalivemap-group atm-inatm clock internalatm pvc 1 1 5 aal5snap!map-list atm-inip 192.168.1.10 atm-vc 1 broadcastCommand Reference
This section documents modified commands. All other commands used with this feature are documented in the Cisco IOS Release 11.2 command references.
atm clock internal
To cause the ATM Interface Processor (AIP) or the ATM port adapter (PA-A1-OC3MM and PA-A1-OC3SM) to generate the transmit clock internally, use the atm clock internal interface configuration command. The no form of this command restores the default value.
atm clock internal
no atm clock internalSyntax Description
This command has no arguments or keywords.
Default
The transmit clock signal from the remote connection (the line). The switch provides the clocking.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command was modified in Cisco IOS Release 11.2 P and 11.1 CA to add information on the PA-A1-OC3MM and PA-A1-OC3SM ATM port adapters.
This command is meaningless on a 4B/5B physical layer interface module (PLIM).
Example
The following example causes the interface to generate the transmit clock internally:
atm clock internalatm pvc
To create a permanent virtual circuit (PVC) on the AIP or NPM interface, or on the ATM port adapter (PA-A1-OC3MM and PA-A1-OC3SM) and, optionally, to generate Operation, Administration, and Maintenance (OAM) F5 loopback cells or enable Inverse ATM ARP, use the atm pvc interface configuration command. The no form of this command removes the specified PVC.
atm pvc vcd vpi vci aal-encap [[midlow midhigh] [peak average burst]] [oam seconds]
[inarp minutes]
no atm pvc vcd vpi vci aal-encap [[midlow midhigh] [peak average burst]] [oam seconds]
[inarp [minutes]Syntax Description
Defaults
If peak and average rates are omitted, the PVC defaults to the highest bandwidth rate queue available. Peak and average rates are then equal. By default, the virtual circuit is configured to run as fast as possible.
The default value of both midlow and midhigh is 0.
If the oam keyword is omitted, OAM cells are not generated. If the oam keyword is present but the seconds value is omitted, the default value of oam seconds is 10 seconds.
If the inarp keyword is missing, inverse ARPs are not generated. If the inarp keyword is present, but the timeout value is not given, then inverse ARPs are generated every 15 minutes.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0. The midlow and midhigh arguments first appeared in Cisco IOS Release 10.3. The oam seconds and inarp minutes commands first appeared in Cisco IOS Release 11.0.
This command was modified in Cisco IOS Release 11.2 P and 11.1 CA to add information on the PA-A1-OC3MM and PA-A1-OC3SM ATM port adapters.
Because the PA-A1-OC3MM and PA-A1-OC3SM ATM port adapters on Cisco 7200 series routers, on the second-generation Versatile Interface Processor (VIP2) in Cisco 7500 series routers, and on Cisco 7000 series routers with the 7000 Series Route Switch Processor (RSP7000) and 7000 Series Chassis Interface (RSP7000CI) do not support traffic shaping, the peak, average, and burst rate options are not available. For more information on the ATM port adapter, refer to the PA-A1 ATM Port Adapter Installation and Configuration publication.
The order of command options is important. The inarp keyword can be specified either separately or after oam has been enabled. The peak, average, and burst arguments, if specified, cannot be specified after either the inarp or the oam keywords.
The Cisco IOS software dynamically creates rate queues as necessary to satisfy the requests of atm pvc commands. The software dynamically creates a rate queue when an atm pvc command specifies a peak/average rate that does not match any user-configured rate queue.
The atm pvc command creates a PVC and attaches it to the VPI and VCI specified. Both vpi and vci cannot be specified as 0; if one is 0, the other cannot be 0. The aal-encap argument determines the AAL mode and the encapsulation method used. The peak and average arguments determine the rate queue used.
Use one of the aal5mux encapsulation options to dedicate the specified virtual circuit to a single protocol; use the aal5snap encapsulation option to multiplex two or more protocols over the same virtual circuit. Whether you select aal5mux or aal5snap encapsulation might depend on practical considerations, such as the type of network and the pricing offered by the network. If the network's pricing depends on the number of virtual circuits set up, aal5snap might be the appropriate choice. If pricing depends on the number of bytes transmitted, aal5mux might be the appropriate choice because it has slightly less overhead.
If you choose to specify any of the peak, average, and burst values, you must specify all three values. You can specify midlow and midhigh values only if you have also specified the peak, average, and burst values.
Message identifier (MID) numbers, which are available only with AAL3/4 (AIP only), are used by receiving devices to reassemble cells from multiple packets. You can assign different midlow to midhigh ranges to different PVCs to ensure that the message identifiers will be unique at the receiving end and, therefore, that messages can be reassembled correctly.
If you are configuring an SVC, this command is required to configure the PVC that handles the SVC call setup and termination. In this case, specify qsaal for the aal-encap argument. See the third example that follows.
The router generates and echoes OAM F5 loopback cells, which verify connectivity. After OAM cell generation is enabled, a cell is transmitted periodically. The remote end must respond by echoing back the cells.
The router does not generate alarm indication signal (AIS) cells, which are used for alarm surveillance functions. However, if it receives an AIS cell, it responds by sending an OAM Far-end Remote Failure (FERF) cell.
Examples
The following example creates a PVC with VPI 0, VCI 6, and uses AAL AAL5-MUX with IP protocol:
atm pvc 1 0 6 aal5mux ipThe following example creates a PVC with VPI 0, VCI 6, and uses AAL AAL3/4-SMDS protocol for an AIP:
atm pvc 1 0 6 aal34smds 0 15 150000 70000 10The following example creates a PVC to be used for ATM signaling for an SVC, and specifies VPI 0 and VCI 5:
atm pvc 1 0 5 qsaalAssuming that no static rate queue has been defined, the following example creates the PVC and also creates a dynamic rate queue with the peak rate set to the maximum allowed by the PLIM and the average set to equal the peak rate:
atm pvc 1 1 1 aal5snapAssuming that no static rate queue has been defined, the following example creates the PVC and also creates a dynamic rate queue with the peak rate set to 100 Mbps (100,000 kbps), the average rate set to 50 Mbps (50,000 kbps), and a burst size of 64 cells (2 * 32 cells):
atm pvc 1 1 1 aal5snap 100000 50000 2Related Commands
atm aal aal3/4
atm maxvc
atm multicast
atm rate-queue
atm smds
mtuloopback
To place OC-3c, DS3, or E3 interfaces on the Cisco 7000 and Cisco 7500 series AIP into loopback mode, to place the interface on the PA-A1-OC3MM and PA-A1-OC3SM ATM port adapters on Cisco 7200 series routers, on the second-generation Versatile Interface Processor (VIP2) in Cisco 7500 series routers, and on Cisco 7000 series routers with the 7000 Series Route Switch Processor (RSP7000) and 7000 Series Chassis Interface (RSP7000CI), or to place OC-3c interfaces on the Cisco 4500 and Cisco 4700 NPM into loopback mode, use the following form of the loopback interface configuration command. Use the no form of this command to remove the loopback.
loopback [diagnostic | line]
no loopback [diagnostic | line]To place E3 or DS3 interfaces on the Cisco 4500 and Cisco 4700 NPM into loopback mode, use the following form of the loopback interface configuration command. Use the no form of this command to remove the loopback.
loopback [line | payload | cell | diagnostic]
no loopback [line | payload | cell | diagnostic]Syntax Description
Default
line; packets loop from the ATM interface back to the ATM network.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.0.
This command was modified in Cisco IOS Release 11.2 P and 11.1 CA to add information on the PA-A1-OC3MM and PA-A1-OC3SM ATM port adapters.
This command is useful for testing because it loops all packets from the ATM interface back to the interface as well as directing the packets to the network.
Example
The following example loops all packets back to the AIP or NPM:
loopback diagnosticshow interfaces atm
To display information about the ATM interface, use the show interfaces atm privileged EXEC command.
show interfaces atm [slot/port] (Cisco 7000 and Cisco 7200 series)
show interfaces atm [slot/port-adapter/port] (on VIP cards in Cisco 7000 series and
Cisco 7500 series)Syntax Description
slot
(Optional) Backplane slot number.
port-adapter
(Optional) Port adapter number on the VIP2, either 0 or 1.
port
(Optional) Interface port number. This is always 0.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command was modified in Cisco IOS Release 11.2 P and 11.1 CA to add information on the PA-A1-OC3MM and PA-A1-OC3SM ATM port adapters.
Sample Displays
The following is sample output from the show interfaces atm command:
Router# show interfaces atm 4/0ATM4/0 is up, line protocol is upHardware is cxBus ATMInternet address is 131.108.97.165, subnet mask is 255.255.255.0MTU 4470 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 1/255Encapsulation ATM, loopback not set, keepalive set (10 sec)Encapsulation(s): AAL5, PVC mode256 TX buffers, 256 RX buffers, 1024 Maximum VCs, 1 Current VCsSignalling vc = 1, vpi = 0, vci = 5ATM NSAP address: BC.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.13Last input 0:00:05, output 0:00:05, output hang neverLast clearing of "show interface" counters neverOutput queue 0/40, 0 drops; input queue 0/75, 0 dropsFive minute input rate 0 bits/sec, 0 packets/secFive minute output rate 0 bits/sec, 0 packets/sec144 packets input, 3148 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort154 packets output, 4228 bytes, 0 underruns0 output errors, 0 collisions, 1 interface resets, 0 restartsThe following is sample output from the show interfaces atm command for the ATM port adapter on a Cisco 7500 series router:
Router# show interfaces atm 0/0/0ATM0/0/0 is up, line protocol is upHardware is cyBus ATMInternet address is 1.1.1.1/24MTU 4470 bytes, sub MTU 4470, BW 156250 Kbit, DLY 80 usec, rely 255/255, load 1/255Encapsulation ATM, loopback not set, keepalive set (10 sec)Encapsulation(s): AAL5, PVC mode256 TX buffers, 256 RX buffers,2048 maximum active VCs, 1024 VCs per VP, 1 current VCCsVC idle disconnect time: 300 secondsLast input never, output 00:00:05, output hang neverLast clearing of "show interface" counters neverQueueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 drops5 minute input rate 0 bits/sec, 1 packets/sec5 minute output rate 0 bits/sec, 1 packets/sec5 packets input, 560 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort5 packets output, 560 bytes, 0 underruns0 output errors, 0 collisions, 0 interface resets0 output buffer failures, 0 output buffers swapped outdescribes the fields shown in both the displays.
Supported MIBs
The ATM UNI specification defines the required MIB functionality for ATM interfaces. MIB attributes are readable and writable across the Interim Local Management Interface (ILMI) using Simple Network Management Protocol (SNMP). The ILMI uses SNMP, without UDP, and IP addressing along with the ATM MIB.
The ATM port adapter supports RFC 1213 and interface MIBs as specified in the ATM MIB V2 specification. Refer to the ATM UNI specification for additional details on the MIB.
What to Do Next
For more information on the PA-A1-OC3MM and PA-A1-OC3SM ATM port adapters, refer to the PA-A1 ATM Port Adapter Installation and Configuration publication.
