Configuration Tasks
This section describes how to configure the 2-Port, 4-Port, and 8-Port Clear-Channel T3/E3 Serial SPAs for the Cisco ASR 1000 Series Routers and verify the configuration. For information about managing your system images and configuration files, refer to the following:
Required Configuration Tasks
This section lists the required configuration steps to configure the 2-Port and 4-Port T3/E3 Serial SPA. Some of the required configuration commands implement default values that might be appropriate for your network. If the default value is correct for your network, then you do not need to configure the command.
Note |
To better understand the address format used to specify the physical location of the SIP, SPA, and interfaces, see the Specifying the Interface Address on a SPA. |
Setting the Card Type
The SPA is not functional until the card type is set. Information about the SPA is not indicated in the output of any show commands until the card type has been set. There is no default card type.
Note |
The card type command is not required to set the serial mode for the 8-Port Clear-Channel T3/E3 SPA. Therefore, this command is not supported in the 8-Port Clear-Channel T3/E3 SPA. This SPA supports both T3 and E3 configurations at the port level, which can be changed without reloading the SPA. The framing type that is configured determines whether a port is in the T3 mode or E3 mode. During first time initialization, by default, all the ports of the 8-Port Clear Channel T3/E3 SPA come up in the T3 mode and C-bit framing. For subsequent reloads, the ports come up in the modes they were configured and saved in. For more information on mixed interface types, see the Configuring Framing. |
To set the card type for the 2-Port and 4-Port T3/E3 Clear-Channel Serial SPAs, complete these steps:
SUMMARY STEPS
- Router# configure terminal
- Router(config)# card type {t3 | e3 } slot subslot
- Router(config)# exit
DETAILED STEPS
Command or Action | Purpose | |
---|---|---|
Step 1 |
Router# configure terminal |
Enters global configuration mode. |
Step 2 |
Router(config)# card type {t3 | e3 } slot subslot |
Sets the serial mode for the SPA:
|
Step 3 |
Router(config)# exit |
Exits configuration mode and returns to the EXEC command interpreter prompt. |
Setting the IP Address
To set the IP address for the 2-Port and 4-Port T3/E3 Serial SPA, complete these steps:
SUMMARY STEPS
- Router(config)# interface serial slot/subslot/port
- Router(config-if)# ip address address mask
- Router(config-if)# clock source {internal | line}
- Router(config-if)# no shut
- Router(config)# exit
DETAILED STEPS
Command or Action | Purpose | |
---|---|---|
Step 1 |
Router(config)# interface serial slot/subslot/port |
Selects the interface to configure and enters interface configuration mode. |
Step 2 |
Router(config-if)# ip address address mask |
Sets the IP address and subnet mask.
|
Step 3 |
Router(config-if)# clock source {internal | line} |
Sets the clock source.
|
Step 4 |
Router(config-if)# no shut |
Enables the interface. |
Step 5 |
Router(config)# exit |
Exits interface configuration mode and returns to the EXEC command interpreter prompt. |
Verifying Controller Configuration
Use the show controllers command to verify the controller configuration:
Router# show controllers serial 2/0/0
Serial2/0/0 -
Framing is c-bit, Clock Source is Line
Bandwidth limit is 44210, DSU mode 0, Cable length is 10
rx FEBE since last clear counter 2, since reset 0
Data in current interval (546 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Data in Interval 1:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Data in Interval 44:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
560 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Total Data (last 44 15 minute intervals):
0 Line Code Violations, 0 P-bit Coding Violation,
0 C-bit Coding Violation,
0 P-bit Err Secs, 0 P-bit Sev Err Secs,
0 Sev Err Framing Secs, 0 Unavailable Secs,
24750 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Transmitter is sending AIS.
Receiver has loss of signal.
40434 Sev Err Line Secs, 0 Far-End Err Secs, 0 Far-End Sev Err Secs
0 P-bit Unavailable Secs, 0 CP-bit Unavailable Secs
0 CP-bit Far-end Unavailable Secs
0 Near-end path failures, 0 Far-end path failures
No FEAC code is being received
MDL transmission is disabled
Use the show controllers brief command to view a subset of the show controllers output:
Router# show controllers serial 2/0/2 brief
Serial2/0/2 -
Framing is c-bit, Clock Source is Internal
Bandwidth limit is 44210, DSU mode 0, Cable length is 10
rx FEBE since last clear counter 0, since reset 22
No alarms detected.
No FEAC code is being received
MDL transmission is disabled
Verifying the Interface Configuration
Use the show interfaces command to verify the interface configuration:
Router# show interfaces serial 2/0/0
Serial2/0/0 is up, line protocol is up
Hardware is SPA-4T3E3
MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec,
reliability 255/255, txload 12/255, rxload 56/255
Encapsulation FRAME-RELAY, crc 16, loopback not set
Keepalive set (10 sec)
LMI enq sent 13477, LMI stat recvd 13424, LMI upd recvd 0, DTE LMI up
LMI enq recvd 19, LMI stat sent 0, LMI upd sent 0
LMI DLCI 1023 LMI type is CISCO frame relay DTE
FR SVC disabled, LAPF state down
Broadcast queue 0/256, broadcasts sent/dropped 0/0, interface broadcasts 0
Last input 00:00:09, output 00:00:09, output hang never
Last clearing of "show interface" counters 1d13h
Input queue: 0/75/3/3891 (size/max/drops/flushes); Total output drops: 5140348
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 9716000 bits/sec, 28149 packets/sec
5 minute output rate 2121000 bits/sec, 4466 packets/sec
14675957334 packets input, 645694448563 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicast)
0 runts, 0 giants, 0 throttles
0 parity
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
14562482078 packets output, 640892196653 bytes, 0 underruns
0 output errors, 0 applique, 4 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
rxLOS inactive, rxLOF inactive, rxAIS inactive
txAIS inactive, rxRAI inactive, txRAI inactive
Serial2/0/0.16 is up, line protocol is up
Hardware is SPA-4T3E3
Internet address is 110.1.1.2/24
MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec,
reliability 255/255, txload 11/255, rxload 53/255
Encapsulation FRAME-RELAY
Specifying the Interface Address on a SPA
SPA interface ports begin numbering with “0” from left to right. Single-port SPAs use only the port number 0. To configure or monitor SPA interfaces, you need to specify the physical location of the SIP, SPA, and interface in the CLI. The interface address format is slot/subslot/port , where:
- slot —Specifies the chassis slot number in the Cisco ASR 1000 Series Aggregation Services Routers where the SIP is installed.
- subslot —Specifies the slot of the SIP where the SPA is installed.
- port —Specifies the number of the individual interface port on a SPA.
The following example shows how to specify the first interface (0) on a SPA installed in the first subslot of a SIP (0) installed in chassis slot 2:
Router(config)# interface serial 2/0/0
This command shows a serial SPA as a representative example, however the same slot/subslot/port format is similarly used for other SPAs (such as ATM and POS) and other non-channelized SPAs.
For more information about identifying slots and subslots, see the Required Configuration Tasks.
Optional Configurations
There are several standard, but optional configurations, that might be necessary to complete the configuration of your serial SPA.
Configuring Data Service Unit Mode
Configure the SPA to connect with customer premises Data Service Units (DSUs) by setting the DSU mode. Subrating a T3 or E3 interface reduces the peak access rate by limiting the data transfer rate.
To configure the DSU mode and bandwidth, use the following commands:
Command |
Purpose |
---|---|
Router# configure terminal |
Enters global configuration mode. |
Router(config)# interface serial s lot/subslot/port |
Selects the interface to configure and enters interface configuration mode. |
T3 Router(config-if)# dsu mode {0 | 1 | 2 | 3 | 4 } E3 Router(config-if)# dsu mode {0 | 1 } |
Specifies the interoperability mode used by a T3 controller.
|
Router(config-if)# dsu bandwidth kbps |
Specifies the allowable bandwidth.
|
Router(config-if)# remote {accept | fullrate } |
Specifies where the DSU bandwidth is set.
|
Verifying DSU Mode
Use the show controllers serial command to display the DSU mode of the controller:
Router# show controllers serial 2/0/0
Serial2/0/0 -
Framing is c-bit, Clock Source is Line
Bandwidth limit is 44210, DSU mode 0, Cable length is 10
rx FEBE since last clear counter 2, since reset 0
Data in current interval (546 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Data in Interval 1:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Configuring Maintenance Data Link
MDL messages are used to communicate identification information between local and remote ports. The type of information included in MDL messages includes the equipment identification code (EIC), location identification code (LIC), frame identification code (FIC), unit, Path Facility Identification (PFI), port number, and Generator Identification numbers.
Note |
C-bit framing must be enabled in order to transport MDL messages between source and destination T3 ports. |
To configure Maintenance Data Link (MDL), use the following commands.
Command |
Purpose |
---|---|
Router# configure terminal |
Enters global configuration mode. |
Router(config)# interface serial slot/subslot/port |
Selects the interface to configure. |
Router(config-if)# mdl [string {eic | fic | generator | lic | pfi | port | unit} string}] | [transmit {idle-signal | path | test-signal}] |
Configures the Maintenance Data Link (MDL) message.
|
Verifying MDL
Use the show controllers serial command to display the MDL settings:
Router# show controllers serial 2/0/0
Serial2/0/0 -
Framing is c-bit, Clock Source is Line
Bandwidth limit is 44210, DSU mode 0, Cable length is 10
rx FEBE since last clear counter 2, since reset 0
Data in current interval (546 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Data in Interval 1:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Data in Interval 96:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Total Data (last 24 hours)
0 Line Code Violations, 0 P-bit Coding Violation,
0 C-bit Coding Violation,
0 P-bit Err Secs, 0 P-bit Sev Err Secs,
0 Sev Err Framing Secs, 0 Unavailable Secs,
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
No alarms detected.
0 Sev Err Line Secs, 1 Far-End Err Secs, 0 Far-End Sev Err Secs
0 P-bit Unavailable Secs, 0 CP-bit Unavailable Secs
0 CP-bit Far-end Unavailable Secs
0 Near-end path failures, 0 Far-end path failures
No FEAC code is being received
MDL transmission is enabled
EIC: tst, LIC: 67,
Test Signal GEN_NO: test
Far-End MDL Information Received
EIC: tst, LIC: 67,
Test Signal GEN_NO: test
Configuring Scramble
T3/E3 scrambling is used to assist clock recovery on the receiving end. Scrambling is designed to randomize the pattern of 1s and 0s carried in the physical layer frame. Randomizing the digital bits can prevent continuous, nonvariable bit patterns—in other words, long strings of all 1s or all 0s. Several physical layer protocols rely on transitions between 1s and 0s to maintain clocking.
Scrambling can prevent some bit patterns from being mistakenly interpreted as alarms by switches placed between the Data Service Units (DSUs).
To configure scrambling, use the following commands:
Command |
Purpose |
||
---|---|---|---|
Router# configure terminal |
Enters global configuration mode. |
||
Router(config)# interface serial slot/subslot/port |
Selects the interface to configure and enters interface configuration mode. |
||
Router(config-if)# [no] scramble |
Enables scrambling. Scrambling is disabled by default.
|
Verifying Scramble Configuration
Use the show controllers serial command to display the scrambling setting:
Router# show controllers serial 2/0/0
Serial2/0/0 -
Framing is c-bit, Clock Source is Line
Bandwidth limit is 44210, DSU mode 0, Cable length is 10
rx FEBE since last clear counter 2, since reset 0
Scrambling is enabled
Data in current interval (356 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Data in Interval 1:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Configuring Framing
Framing is used to synchronize data transmission on the line. Framing allows the hardware to determine when each packet starts and ends. To configure framing, use the following commands:
Command |
Purpose |
---|---|
Router# configure terminal |
Enters global configuration mode. |
Router(config)# interface serial slot/subslot/port |
Selects the interface to configure and enters interface configuration mode. |
T3 Router(config-if)# framing {bypass | c-bit | m13 } E3 Router(config-if)# framing {bypass | g751| g832 } 8-Port Clear-Channel T3/E3 SPA Router(config-if)# framing {bypass-ds3 | bypass-e3 | c-bit | m13 | g751 | g832 } |
Sets the framing on the interface.
|
The following table determines the T3 or E3 mode of the interface based on the framing type configured:
Framing Type |
Interface T3/E3 Mode |
---|---|
bypass-ds3 |
T3 |
c-bit |
T3 |
m13 |
T3 |
bypass-e3 |
E3 |
g751 |
E3 |
g832 |
E3 |
Verifying Framing Configuration
Use the show controllers serial command to display the framing method:
Router# show controllers serial 2/0/0
Serial2/0/0 -
Framing is c-bit, Clock Source is Line
Bandwidth limit is 44210, DSU mode 0, Cable length is 10
rx FEBE since last clear counter 2, since reset 0
Data in current interval (546 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Data in Interval 1:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Configuring Encapsulation
When traffic crosses a WAN link, the connection needs a Layer 2 protocol to encapsulate traffic. To set the encapsulation method, use the following commands:
Command |
Purpose |
---|---|
Router# configure terminal |
Enters global configuration mode. |
Router(config)# interface serial slot/ subslot/port:channel-group |
Selects the interface to configure. |
Router(config-if)# encapsulation encapsulation-type {hdlc | ppp | frame-relay} |
Sets an encapsulation type on the interface:
|
Verifying Encapsulation
Use the show interfaces serial command to verify encapsulation on the interface:
Router# show interfaces serial 2/0/0:0
Serial2/0/0:0 is down, line protocol is down
Hardware is SPA-8XCHT1/E1
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, crc 32, loopback not set
Keepalive set (10 sec)
LCP Closed, multilink Closed
Last input 1w0d, output 1w0d, output hang never
Last clearing of show interfaceunters 6d23h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/0/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1152 kilobits/sec
30 second input rate 0 bits/sec, 0 packets/sec
30 second output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions alarm present
Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags
Configuring Cable Length
The cablelength command compensates for the loss in decibels based on the distance from the device to the first repeater in the circuit. A longer distance from the device to the repeater requires that the signal strength on the circuit be boosted to compensate for loss over that distance. To configure cable length, use the following commands:
Command |
Purpose |
---|---|
Router# configure terminal |
Enters global configuration mode. |
Router(config)# interface serial slot/subslot/port |
Selects the interface to configure and enters interface configuration mode. |
Router(config-if)# cablelength length |
Sets the cable length.
|
Verifying Cable Length Setting
Use the show interfaces serial command to verify the cable length setting:
Router# show interfaces serial 2/0/0
Serial2/0/0 -
Framing is c-bit, Clock Source is Internal
Bandwidth limit is 44210, DSU mode 0, Cable length is 200
rx FEBE since last clear counter 0, since reset 22
Data in current interval (446 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Data in Interval 1:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Data in Interval 2:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Configuring Invert Data
Delays between the terminal equipment (TE) clock and data transmission indicate that the transmit clock signal might not be appropriate for the interface rate and length of cable being used. Different ends of the wire may have variances that differ slightly. Invert the clock signal to compensate for these factors. To configure invert data, use the following commands:
Command |
Purpose |
---|---|
Router# configure terminal |
Enters global configuration mode. |
Router(config)# interface serial slot/subslot/port |
Selects the interface to configure and enters interface configuration mode. |
Router(config-if)# invert data |
Inverts the data stream. |
Verifying Invert Data Setting
Use the show running configuration command to verify that invert data was set on the interface:
Router# show running configuration
interface Serial2/0/0
ip address 51.1.1.1 255.255.255.0
logging event link-status
dsu bandwidth 44210
framing c-bit
cablelength 10
clock source internal
invert data
mdl string eic tst
mdl string lic 67
mdl string generator test
mdl transmit path
mdl transmit test-signal
no cdp enable
!
Configuring the Trace Trail Buffer
Configure Trace Trail Buffer (TTB) to send messages to the remote device. The TTB messages check for the continued presence of the transmitter. To configure TTB, use the following commands:
Command |
Purpose |
---|---|
Router# configure terminal |
Enters global configuration mode. |
Router(config)# interface serial slot/subslot/port |
Selects the interface to configure and enters interface configuration mode. |
Router(config-if)# ttb {country | rnode | serial | snode | soperator | x } string |
Sends a Trace Trail Buffer message in E3 g.832 framing mode.
|
Verifying TTB Settings
Use the show controllers serial command to display the TTB settings for the interface:
Router# show controllers serial 2/0/0
Serial2/0/0 -
Framing is c-bit, Clock Source is Line
Bandwidth limit is 44210, DSU mode 0, Cable length is 10
rx FEBE since last clear counter 2, since reset 0
Data in current interval (546 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Data in Interval 1:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
No alarms detected.
TTB transmission is disabled
TTB Rx: country: us soperator: s snode: sn rnode: rn x: x serial: 1
Configuring QoS Features on Serial SPAs
The SIPs and SPAs support many QoS features using modular QoS CLI (MQC) configuration. Since there are no serial SPA-specific QoS features, refer to your network processor documentation for QoS configuration information.
Saving the Configuration
To save your running configuration to nonvolatile random-access memory (NVRAM), use the following command in privileged EXEC configuration mode:
Command |
Purpose |
---|---|
Router# copy running-config startup-config |
Writes the new configuration to NVRAM. |
For information about managing your system images and configuration files, refer to the Cisco IOS Configuration Fundamentals Configuration Guide and Cisco IOS Configuration Fundamentals Command Reference publications for your Cisco IOS software release.