Related Documentation
- MX Series
- Understanding the Broadband Gateway Exception Handling
- Understanding GTP-U Error Exception Handling
- Understanding Broadband Gateway IP Fragment Handling
- Configuring Fragment Reassembly Parameters
- Understanding IPv6 Protocol Parameters
- Configuring IPv6 Protocol Parameters
- Configuring Exception Handling Traceoptions
Example: Configuring Broadband Gateway Exception Handling Parameters
This example shows how to configure exception handing parameters on the MobileNext Broadband Gateway. Both IP reassembly and IPv6 advertisement parameters are configured.
Requirements
This example uses the following hardware and software components:
- An MX chassis equipped with session Dense Port Concentrators (DPCs) and three interface Packet Forwarding Engines (housed in DPCs or Modular Port Concentrators [MPCs]).
- Junos OS Mobility package
Before you begin:
- Install the chassis hardware.
- Configure the chassis, as well as interfaces, anchors, and (optionally) redundancy.
Overview
There are four exceptions to the general rule that user packets flow only through interface Packet Forwarding Engine hardware:
- Anchor Packet Forwarding Engine failovers (N:1)
- Reassembly of GPRS tunneling protocol, user plane (GTP-U) and mobility control plane (for instance, authentication, authorization, and accounting [AAA]) fragments
- IPv6 router advertisements and router solicitation packet handling
- GTP-U error indication generation
The first and last items have no configurable parameters. This example configures parameters for IP fragment reassembly and IPv6 router advertisements. The IP fragment reassembly parameters are configured in reassembly-profile-one (you can have multiple reassembly profiles) and applied to the gateway (MBG1). All of the statements in this example use the default values.
Configuration
The parameters for IP fragment reassembly and IPv6 router advertisements are configured by:
CLI Quick Configuration
Step-by-Step Procedure
Results
From configuration mode, confirm your configuration by entering the show command at the various hierarchy levels. If the output does not display the intended configuration, repeat the configuration instructions in this example to correct it.
For brevity, these show command outputs include only the configuration that is relevant to this example.
After you configure the device, enter commit from configuration mode.
Verification
Verifying the IP Reassembly Configuration
Purpose
Verify that IP reassembly exception handling is operating.
Action
From operational mode, enter the show unified-edge gateways ggsn-pgw ip-reassembly statistics command.
Meaning
Non-zero values indicate that reassembly is functioning.
 | Note: You must inspect IPv6 router advertisement packets directly to verify configured header field parameters. |
Verifying the Exception Handling Configuration
Purpose
Verify that exception handling is operating.
Action
From operational mode, enter the show unified-edge gateways ggsn-pgw exception-handling statistics command.
| Note: You can clear these statistics with the clear unified-edge gateways ggsn-pgw exception-handling statistics command. |
Meaning
Non-zero values indicate that exception handling is functioning.
Related Documentation
- MX Series
- Understanding the Broadband Gateway Exception Handling
- Understanding GTP-U Error Exception Handling
- Understanding Broadband Gateway IP Fragment Handling
- Configuring Fragment Reassembly Parameters
- Understanding IPv6 Protocol Parameters
- Configuring IPv6 Protocol Parameters
- Configuring Exception Handling Traceoptions
