* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Routing Protocols & Troubleshooting the Network Semester 2
Survey
Document related concepts
Deep packet inspection wikipedia , lookup
Distributed firewall wikipedia , lookup
IEEE 802.1aq wikipedia , lookup
Piggybacking (Internet access) wikipedia , lookup
Multiprotocol Label Switching wikipedia , lookup
Wake-on-LAN wikipedia , lookup
Network tap wikipedia , lookup
Cracking of wireless networks wikipedia , lookup
Computer network wikipedia , lookup
Airborne Networking wikipedia , lookup
Zero-configuration networking wikipedia , lookup
Internet protocol suite wikipedia , lookup
Recursive InterNetwork Architecture (RINA) wikipedia , lookup
Transcript
Routing Protocols & Troubleshooting the Network Semester 2, Chapter 12-13 Static Routing Static Routes – configure with ip route command, example: (config)#ip route network address SNMask interface address Administrative distance is the rating of trustworthiness of routing info source Can go from 0 to 255 Static routes are 1 Default for RIP is 120 Default Routes Use default route when you only have partial information about destination network Send data to default network when you don’t have info in routing table Keeps routing table shorter IP Default-network command addes to all routers in network, example: IP default-network 152.43.0.0 Autonomous Systems A group of routers that show a consistent view of routing to the outside world. Assigned a unique number by InterNIC IGRP routing protocol requires an assigned number Ex: Router IGRP 100 Exterior routing protocols are used between autonomous systems -BGP RIP Distance Vector Protocol Uses hop count – over 15 is discarded Sends updates every 30 seconds (Config)#router rip (config-router)#network <attached network(s)> Show ip protocol command shows protocol, networks, gateways, distance, update times, administrative distance Show ip route – contents of routing table Troubleshooting The Network: Examples of problems in each layer might include: Layer 1 - incorrect cable used Layer 2 - interface not configured for Ethernet Layer 3 - subnet mask is incorrect Layer 1 errors include: broken cables disconnected cables cables connected to the wrong ports intermittent cable connection wrong cables used for the task at hand (must use rollovers, cross-connects, and straight-through cables correctly) transceiver problems DCE cable problems DTE cable problems devices turned off Layer 2 errors include: improperly configured serial interfaces improperly configured Ethernet interfaces improper encapsulation set (HDLC is default for serial interfaces) improper clockrate settings on serial interfaces Layer 3 errors include: routing protocol not enabled wrong routing protocol enabled incorrect IP addresses incorrect Subnet Masks incorrect DNS to IP bindings