Setup guide

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Cisco 6400 Software Setup Guide
OL-1183-04
Chapter3 Basic NRP Configuration
NRP-2 and NRP-2SV Configuration
Restrictions
For a complete list of restrictions, limitations, and supported features, see the release notes for the
software version running on your NRP-2.
This section describes the following limitations:
• Soft PVCs Between the NRP-2 and NSP
• Maximum Transmission Unit
• VPI and VCI Limitation
Soft PVCs Between the NRP-2 and NSP
Soft PVCs between the NRP-2 and NSP are not supported.
Maximum Transmission Unit
The maximum transmission unit (MTU) of the NRP-2 ATM interface to the backplane is 1900 bytes.
Any incoming ATM packet larger than 1900 bytes is dropped by the NRP-2. To make sure that no
incoming packets are larger than the NRP-2 MTU, see the “Matching the MTU Size of the NRP-2 and
Its Network Neighbors” section on page3-11.
VPI and VCI Limitation
Note For Cisco IOS Releases 12.2(4)B, 12.2(13)T, 12.3, and later releases, the NRP-2SV supports 16 bits of
VPI and VCI values. The 14-bit VPI and VCI limitation described in this section applies to the NRP-2
and to the NRP-2SV running CiscoIOS Release 12.2(2)B and earlier releases.
VPI and VCI values on the NRP-2 must share 14 bits. By default, VPI values are limited to 4 bits (0–15),
and VCI values are limited to 10 bits (0–1023). You can change the VPI and VCI ranges, but together
the VPI and VCI values cannot exceed 14 bits. To change the allowed VPI and VCI values, see the
“Modifying VPI and VCI Ranges on the NRP-2” section on page3-13.
Prerequisites
• A Personal Computer Memory Card International Association (PCMCIA) disk must be in NSP disk
slot 0. If using redundant NSPs, make sure that the secondary NSP also has a PCMCIA disk in disk
slot 0.
• Use the same release versions for the system images on the NRP-2 and the NSP.
• Copy the NRP-2 image to a TFTP server on the local management network or to the PCMCIA disk
in NSP disk slot 0.
• Complete the NSP configuration tasks in the “NRP-2 and NRP-2SV Support” section on page2-19.