Debugging Scalable NetWare Protocols
505
network is supposed to use NLSP, manually verify this command on each
interface and on each network resource.
Unlike IPX RIP, NLSP will send an update only if there is a change to the
routing topology. If no modifications occur for two hours, NLSP sends an
update to all neighbors. Also, NLSP is configured with an area address,
which is defined in the command area-address address mask. Using an
address and mask of zero defines that all IPX networks belong to the NLSP
area. Typically, administrators disable IPX RIP when enabling NLSP.
Additional information about NLSP configuration is available in the CCNP:
Advanced Cisco Router Configuration Study Guide by Todd Lammle, Kevin
Hales, and Donald Porter (ISBN 0-7821-2403-8, Sybex, Inc., 1999).
An NLSP Hello packet is sent regularly to inform neighbor routers of its
status. An Ethernet example appears, as follows:
Flags: 0x80 802.3
Status: 0x00
Packet Length:92
Timestamp: 00:55:25.715452 10/21/1998
802.3 Header
Destination: ff:ff:ff:ff:ff:ff Ethernet Brdcast
Source: 00:00:0c:3e:82:2a
Length: 74
IPX - NetWare Protocol
Checksum: 0xffff
Length: 73
Transport Control:
Reserved: %0000
Hop Count: %0000
Packet Type: 0 Novell
Destination Network: 0x00000000
Destination Node: ff:ff:ff:ff:ff:ff Ethernet Brdcast
Destination Socket: 0x9001 IPX Static
Source Network: 0x00000010
Source Node: 00:00:0c:3e:82:2a
Source Socket: 0x9001 IPX Static
Copyright ©2000 SYBEX , Inc., Alameda, CA
www.sybex.com