Troubleshooting BGP Philip Smith PacNOG 2 Workshop Apia‚ Samoa 18-24 June 2006 PacNOG 2 Workshop © 2006 Cisco Systems‚ Inc. All rights reserved. 1 Agenda • Fundamentals of Troubleshooting • Local Configuration Problems • Internet Reachability Problems PacNOG 2 Workshop © 2006 Cisco Systems‚ Inc. All rights reserved. 2 Fundamentals: Problem Areas • First step is to recognise what usually causes problems • Possible Problem Areas: Misconfiguration Configuration
Premium Routing Border Gateway Protocol
Identify a router as a computer with specialised hardware and operating system designed for routing Give a router a basic configuration including IP addresses Routing tables Router activities – finding the best paths and switching packets Connect networks together Find best routes Switch packets from one network to another Do this efficiently 24/7 Provide security by permitting or denying specified types of packet Provide quality of service by prioritising
Premium Routing IP address
true about router? a. routers enable different IP networks or IP subnets to communicate with each other. c. path selection is one of the main functions of a router. e. routers have a central processing unit and memory. 4. Which of the following are main components of a router? a. ROM b. Flash memory e. RAM 5. Which of the following statements describe the function of RAM in a router? c. RAM stores the current configuration information. e. RAM stores routing tables for the router. 6.
Premium Serial port Serial communication Cisco Systems
the demark for a DS1/T1 circuit at is ____. RJ-48 Given the following routing table on a router‚ which next hop will the router select given the IP packet with the destination address of: 19.48.254.3 Router 2 Which address below belongs to the Class A network range? 126.254.1.45 Which of the following dynamic routing protocols is an exterior gateway protocol? BGP Out of the following which does a router normally use when making a decision about routing an IP packet? Destination IP Adress How
Premium IP address Subnetwork Classful network
default gateway IP address are not in the same network. The no shutdown command was not issued for VLAN 1. The local DNS server is not functioning correctly. 2. While trying to solve a network issue‚ a technician made multiple changes to the current router configuration file. The changes did not solve the problem and were not saved. What action can the technician take to discard the changes and work with the file in NVRAM? Issue the reload command without saving the running configuration. Close and
Premium IP address Ethernet Router
This document is exclusive property of Cisco Systems‚ Inc. Permission is granted to print and copy this document for non-commercial distribution and exclusive use by instructors in the CCNA Exploration: LAN Switching and Wireless course as part of an official Cisco Networking Academy Program. Lab 1.3.1: Review of Concepts from Exploration 1 Topology Diagram Learning Objectives Upon completion of this lab‚ you will be able to: • • • • • • Create a logical topology given network requirements
Premium IP address Subnetwork
CCNA Routing and Switching: Introduction to Networks Instructor Packet Tracer Manual This document is exclusive property of Cisco Systems‚ Inc. Permission is granted to print and copy this document for non-commercial distribution and exclusive use by instructors in the CCNA Security course as part of an official Cisco Networking Academy Program. Packet Tracer - Network Representation (Instructor Version) Instructor Note: Red font color or Gray highlights indicate text that appears in
Premium IP address OSI model
inverse packets exchanged between two routers that have a PVC connection. The IP addresses are 172.14.20.16/16 and ... [PDF]8.8 PRACTICE SET cs.mty.itesm.mx/profesores/raul.perez/InterconexionRedes/.../Chap8.pdf A router with IP address 125.45.23.12 and Ethemet physical address. 23:45:AB:4F:67:CD has received a packet for a host destination with IP address. 125.11.78.10 and Ethernet physical ... Show the contents of ATMARP inverse packets exchanged between two routers that have a PVC connection. The
Premium Internet Protocol IP address
Voice Gateway Router Internet 10 Step to configure Cisco Call Manager Express Configuring Inter-VLAN Routing Router# configure terminal Router(config)# interface fa0/0 Router(config-if)# no ip address Router(config-if)# exit Router(config)# interface fa0/0.10 Router(config-subif)# description ROUTER INTERFACE FOR VOICE VLAN Router(config-subif)# encapsulation dot1q 10 Router(config-subif)# ip address 172.16.1.1 255.255.255.0 Router(config-subif)# ip helper-address 172.16.2.5 Router(config-subif)#
Premium IP address Cisco Systems Subnetwork
currently having an internet connection‚ which is setup using a Cisco router. The gateway addresses for users in the LAN is currently provided as an intermediate routers address‚ which would then forward all internet bound packets to the internet router. The network has to be upgraded by having dual intermediate routers which would automatically failover‚ and provide high availability access to the internet. HSRP (Hot Standby Router Protocol) or VRRP (Virtual Redundant Routing Protocol) is to be
Premium Computer network Local area network Routing