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- play_arrow Configuring Ethernet Interfaces
- play_arrow Configuring Interface Encapsulation
- play_arrow Configuring Link Services Interfaces
- Configuring Link Services Interfaces
- Configuring Link Fragmentation and Interleaving
- Configuring Class-of-Service on Link Services Interfaces
- Achieving Greater Bandwidth, Load Balancing, and Redundancy with Multilink Bundles
- Configuring Multilink Frame Relay
- Configuring Compressed Real-Time Transport Protocol
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- play_arrow Configuration Statements and Operational Commands
Configuring 1-Port Clear Channel DS3/E3 GPIM
The 1-Port Clear Channel DS3/E3 GPIM is a channel interface that can support full-duplex DS3 (T3) or E3 line rates. The below topics shows the overview of the interface, examplse on how to configure the 1-Port Clear Channel DS3/E3 GPIM for DS3 port mode, E3 port mode and M23 mapping mode respectively.
Understanding the 1-Port Clear Channel DS3/E3 GPIM
The 1-Port Clear Channel DS3/E3 Gigabit-Backplane Physical Interface Module (GPIM) for the device functions as a clear channel interface that can support full-duplex DS3 (T3) or E3 line rates of 44.796 or 34.368 Mbps, respectively. The DS3/E3 interface is a popular high-bandwidth WAN interface for large enterprise branch locations that enables high-quality voice, video, and data applications with reduced latency. The GPIM device does not support channelization, but it supports a subrate DS3/E3 configuration.
This topic includes the following sections:
Supported Features
The clear channel implementation provides such features as subrate and scrambling options used by major DSU vendors. The following key features are available depending on the interface and mode selections:
Framed and unframed DS3 (default) and E3 port modes
Support for frame relay, point-to-point, and HDLC serial encapsulation protocols
Support for popular vendor algorithms for subrate and payload scrambling
Support for generation and detection of loopback control codes (line-loopback activate and deactivate) and FEAC codes
External and internal clocking support
Support for DS3 and E3 network alarms
Support for chassis clusters
Support for anti-counterfeit check
Loopback (local, remote, and payload) and BERT/PRBS/QRSS diagnostics support
MTU size of 4474 bytes (default) and 9192 bytes (maximum)
Interface Naming
The following format represents the 1-Port Clear Channel DS3/E3 GPIM interface names:
type-fpc/pic/port
where:
type—Media type (T3 or E3)
fpc—Number of the Flexible PIC Concentrator (FPC) card on which the physical interface is located
pic—Number of the PIC on which the physical interface is located
port—Specific port on the PIC
Examples: t3-1/0/0 and e3-2/0/0
Physical Interface Settings
The 1-Port Clear Channel DS3/E3 GPIM supports IP configurations. Using the CLI, you can configure the 1-Port Clear Channel DS3/E3 GPIM to operate in either DS3 or E3 mode. By default, at installation the physical interface, t3-x/y/z, is enabled on the GPIM port operating in DS3 mode with T3 framing.
You can reset the mode of the physical interface to E3 using
the edit chassis command:
[edit] user@host# set chassis fpc 1 pic 0 port 0 framing e3
Logical Interface Settings
The logical interface for the
device is determined by setting the t3-options or e3-options of the edit interfaces command.
You can specify the MTU size for the GPIM interface. Junos OS supports an MTU value of 4474 bytes for the default value or up to 9192 bytes for maximum jumbo GPIM implementations.
Table 1 identifies network interface specifications for DS3 or E3 modes.
Description | DS3 Mode | E3 Mode |
|---|---|---|
Network Interface Specifications | ||
Line encoding | B3ZS | HDB3 |
Framing |
| G.751 (default) |
Subrate and scrambling | Vendor algorithms supported:
| Vendor algorithms supported:
|
Network alarms | Supported in accordance with the ANSI specification:
| Supported in accordance with the ITU-T specification:
|
Error counters | Incremented during a periodic 1-second polling routine:
| Incremented during a periodic 1-second polling routine:
|
HDLC Features | ||
MTU | Default (4474 bytes) or maximum jumbo (up to 9192 bytes) | Default (4474 bytes) or maximum jumbo (up to 9192 bytes) |
Shared flag | Supported | Supported |
Idle flag/fill (0x7e or all ones) | Supported | Supported |
Counters | Runts, giants | Runts, giants |
See Also
Example: Configuring the 1-Port Clear-Channel DS3/E3 GPIM for DS3 Port Mode
This example configures the GPIM in the DS3 (T3) operation mode.
Requirements
Before you begin:
Install the device as specified in the SRX Series Services Physical Interface Modules Hardware Guide.
Overview
This example configures the basic T3 interface and modifies the framing to C-bit parity mode.
Topology
Configuration
Procedure
Step-by-Step Procedure
To configure the GPIM:
Verify the installation, location, and status of the GPIM. In this example, the GPIM is installed in slot 8/PIC 0 and is currently online.
content_copy zoom_out_mapuser@host> show chassis fpc pic-status
content_copy zoom_out_mapSlot 0 Online FPC PIC 0 Online 4x GE Base PIC Slot 2 Offline FPC Slot 5 Offline FPC Slot 6 Online FPC PIC 0 Online 4x CT1E1 gPIM Slot 7 Offline FPC Slot 8 Online FPC PIC 0 Online 1x CLR CH T3/E3
Set the IP address for the logical interface.
content_copy zoom_out_map[edit] user@host# set interfaces t3-8/0/0 unit 0 family inet address interface 192.107.1.230/24
Set the MTU value to 9018.
content_copy zoom_out_map[edit] user@host# set interfaces t3-8/0/0 unit 0 family inet mtu 9018
Set the framing mode.
content_copy zoom_out_map[edit] user@host# set interfaces t3-8/0/0 t3-options cbit-parity
Enable the unframed DS3 mode.
content_copy zoom_out_map[edit] user@host# set interfaces t3-8/0/0 t3-options unframed
If you are done configuring the device, commit the configuration.
content_copy zoom_out_map[edit] user@host# commit
To verify the configuration for your device, enter the following operational command:
content_copy zoom_out_mapuser@host> show interfaces t3-8/0/0 extensive
Example: Configuring the 1-Port Clear Channel DS3/E3 GPIM for E3 Port Mode
This example modifies the default configuration for an E3 environment.
Requirements
Before you begin:
Install the device as specified in the SRX Series Services Physical Interface Modules Hardware Guide.
Overview
This example configures the basic E3 interface.
Topology
Configuration
Procedure
Step-by-Step Procedure
To configure the GPIM in E3 framing:
Verify the installation, location, and status of the GPIM. In this example, the GPIM is installed in slot 8/PIC 0 and is currently online.
content_copy zoom_out_mapuser@host> show chassis fpc pic-status
content_copy zoom_out_mapSlot 0 Online FPC PIC 0 Online 4x GE Base PIC Slot 2 Offline FPC Slot 5 Offline FPC Slot 6 Online FPC PIC 0 Online 4x CT1E1 gPIM Slot 7 Offline FPC Slot 8 Online FPC PIC 0 Online 1x CLR CH T3/E3
Change to E3 port mode.
content_copy zoom_out_map[edit] user@host# set chassis fpc 8 pic 0 port 0 framing e3
Reset the MTU value to 3474.
content_copy zoom_out_map[edit] user@host# set interfaces e3-8/0/0 unit 0 family inet mtu 3474
Enable the unframed mode.
content_copy zoom_out_map[edit] user@host# set interfaces e3-8/0/0 e3-options unframed
If you are done configuring the device, commit the configuration.
content_copy zoom_out_map[edit] user@host# commit
To verify the configuration for your device, enter the following operational command:
content_copy zoom_out_mapuser@host> show interfaces e3-8/0/0 extensive
Example: Configuring the 1-Port Clear-Channel DS3/E3 GPIM for M23 Mapping Mode
The following example configures the GPIM in DS3 with M23 mapping mode. Note that M23 mapping does not provide C-bit parity.
Requirements
Before you begin:
Install the device as specified in the SRX Series Services Physical Interface Modules Hardware Guide.
Overview
This example configures the basic T3 interface and modifies the framing to M23 mode without C-bit parity.
Topology
Configuration
Procedure
Step-by-Step Procedure
To configure the GPIM:
Verify the installation, location, and status of the GPIM. In this example, the GPIM is installed in slot 8/PIC 0 and is currently online.
content_copy zoom_out_mapuser@host> show chassis fpc pic-status
content_copy zoom_out_mapSlot 0 Online FPC PIC 0 Online 4x GE Base PIC Slot 2 Offline FPC Slot 5 Offline FPC Slot 6 Online FPC PIC 0 Online 4x CT1E1 gPIM Slot 7 Offline FPC Slot 8 Online FPC PIC 0 Online 1x CLR CH T3/E3
Set the IP address for the logical interface.
content_copy zoom_out_map[edit] user@host# set interfaces t3-8/0/0 unit 0 family inet address interface 192.107.1.230/24
Set the MTU value to 9018.
content_copy zoom_out_map[edit] user@host# set interfaces t3-8/0/0 unit 0 family inet mtu 9018
Set the framing mode.
content_copy zoom_out_map[edit] user@host# set interfaces t3-8/0/0 t3-options m23
Disable C-bit parity for M23 mode.
content_copy zoom_out_map[edit] user@host# set interfaces t3-8/0/0 t3-options no-cbit-parity
If you are done configuring the device, commit the configuration.
content_copy zoom_out_map[edit] user@host# commit
To verify the configuration for your device, enter the following operational command:
content_copy zoom_out_mapuser@host> show interfaces t3-8/0/0 extensive
