Configuring Path MTU (NSM Procedure)

You can configure a path MTU (maximum transmission unit) which prevents fragmentation.

To configure a path MTU :

  1. In the NSM navigation tree, select Device Manager > Devices.
  2. Click the Device Tree tab, and then double-click the device for which you want to configure a path MTU.
  3. Click the Configuration tab. In the configuration tree, select Protocols > Mpls > Path Mtu.
  4. To configure path MTU, select Enable Feature.
  5. Enter a descriptive comment about the path MTU in Comment.
  6. To fragment IP before encapsulating in MPLS, select Allow Fragmentation.
  7. Select Protocols > Mpls > Path Mtu > Rsvp.
  8. To configure this feature, select Enable Feature.
  9. Enter a descriptive comment about RSVP in Comment.
  10. To enable RSVP path MTU signaling, select Mtu Signaling.
  11. Click one:
    • OK—Saves the changes.
    • Cancel—Cancels the modifications.
    • Apply—Applies the path MTU or RSVP parameters.

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