Semester 4 - Review
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Frame Relay
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A CCITT and ANSI Standard for data transmission over a PDN
Works at Layers 1 and 2
Relies on upper layers (TCP) for error corrections
Uses HDLC encapsulation to run virtual circuits
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Defenitions
Access rate - clock (port) speed of the connection (local loop)
DLCI - Data-Link connection identifier Identifies end point of the network. Has local loop significance only.
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Routing
Uses Novell RIP as routing protocol
Metrics used: Hop count (16 max) and Ticks (1/18 sec)
Tick counts for LAN (1 tick count), WAN (6 tick count)
Uses Split Horizons to prevent routing loops
Sends updates every 60 seconds
Netware Services
SAP - Service Advertisement Protocol
File Servers, Print Servers and Routers build SAP Tables
SAP tables are sent every 60 seconds
One type of SAP is GNS (Get Nearest Server)
GNS requests are answered by file servers on the same network. Routers forward requests to servers
if there are no servers on that network. Routers will perform load balancing if more than one server exists.
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Configuring IPX on the router
Two step process. One step in global mode the other is interface specific.
Enable IPX routing - Router(config)#ipx routing node address
Set load sharing - Router(config)#ipx maximum-paths number paths
Configure interfaces (or sub-interfaces) - Router(config)#interface ethernet 0 (or 0.1)
Encapsulation type - Router(config-if)#encapsulation novell-ether(or sap or arpa or snap)
Network number - Router(config-if)#ipx network 9e (or any number up to 32 bits)
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Monitoring and Troubleshooting Commands
show ipx interface - IPX status and parameters
shop ipx route - routing table contents
show ipx servers - IPX server list
show ipx traffic - number and type of packets sent and received
debug ipx routing activity - information about RIP update packets
debug ipx sap - information about SAP update packets
ping - ICMP echo and response to test layer 3 connectivity
Goto page 2
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