LINX accredited training Another 10 years. Stephen Groombridge Systems & Network Training

Transcription

1 LINX accredited training Another 10 years Stephen Groombridge Systems & Network Training

2 The training programme LINX 1 TCP/IP TCP/IP IPv4 some IPv6 IPv4 some/bit more IPv6 LINX 2 Static routes, OSPF, Static routes, OSPF, ISIS, VRRP ISIS, VRRP LINX 3 BGP BGP A lot of the Internet today looks much the same as the Internet of a decade ago. Another 10 Years Later June 2018 Geoff Huston

3 LINX week RFC 791 RFC 793 RFC 768 ipconfig ping tracert arp -a nslookup netstat r nmap ipconfig ping tracert arp -a nslookup netstat r nmap Not covered: QUIC, MPTCP

4 LINX week Routing Protocols RFC 5798 RFC 2328 RFC 5340 RFC 7142 VRRP OSPFv2 OSPFv3 IS-IS [ISO10589-Second-Edition] Not covered: BABEL, LISP

5 LINX week BGP 4271 A Border Gateway Protocol 4 (BGP-4). Y. Rekhter, Ed., T. Li, Ed., S. Hares, Ed.. January (Format: TXT= bytes) (Obsoletes RFC1771) (Updated by RFC6286, RFC6608, RFC6793, RFC7606, RFC7607, RFC7705, RFC8212) (Status: DRAFT STANDARD) (DOI: /RFC4271)

6 LINX week 1: Example of changes Application Presentation Session TCP IP Network card Cable IP and networking foundation Chapter 12/22 What is TCP/IP? Application Presentation Session TCP IP Network card Cable TCP/IP foundation Chapter 2/22 What is TCP/IP?

7 Recent changes (2018) Ideas anyone? LINX 1 SNMP chapter SNMP: 2 slides TCP/IP Added GNS3, VLANs LINX 2 VLANS Added Peering, BGP, MPLS Routing LINX 3 MPLS Route server hands on BGP BGP security More IPv6 MPLS L3 VPN Network automation? Answers on a postcard to: info@snt.co.uk

8 The exams Multiple choice but Marked by qualified staff Written comments are considered Includes scenario based questions Two main types of question Circle the best answer Circle all that apply (more than one out of up to 12) LAIT 1: LAIT 2 and 3: 40 questions 90 minutes 60 questions 120 minutes

9 Example LINX 1 question Circle the best answer. The following is an example of: Network Destination Netmask Gateway Interface Metric On-link On-link On-link On-link On-link On-link On-link On-link A B C D a routing table a bridge table a MAC table an ARP table

10 OLD LAIT 1 example question 2 Circle all that apply. Which of the following are true with regard to routers? A Routers are considered to be layer 3 devices. G Routers cannot be configured by telnet as routers are not layer 7 devices. B Routers modify the layer 2 addresses of H Routers sometimes act as a web server forwarded packets. to allow easier configuration. C Routers are sometimes called gateways. D Routers have a lower latency than hubs. I Routers modify the TTL field in IP headers. J The most popular routing protocol is IGRP. E Routing tables contain all possible routes K Routers connected to the Internet will to a destination. always use static routes F Routers are normally self configuring.

11 LAIT 2 example question Circle the best answer. What would be the best aggregation of the following addresses Over summarisation is NOT to be used / / / /24 A These addresses cannot be aggregated as they already have a mask. B /30 C /23 and /23 D /21 E /20

12 Example LINX 3 question Circle all that apply. Which of the following are true with regard to BGP A B C D E F G H I BGP uses TCP for transmission of BGP packets. BGP uses type 5 packets as acknowledgements. BGP is a link state protocol. BGP uses hello packets every 10 seconds. BGP sends full routing tables every 30 minutes if there is no change in network topology. BGP by default picks the fastest (based on bandwidth) route to a destination as best route. BGP has a number of metrics it can use to determine the best path to a destination. IBGP should be used by ISPs to carry internal infrastructure addresses BGP should not be used with less than full routing tables.

13 Example LINX 3 question Weight: 100 MED: 400 AS2 Circle the best answer. R1 will route to /8 via R1 AS1 IBGP R3 R2 Weight: 200 MED: 300 AS4 AS3 AS /8 A B C D R2 as it has the lowest weight R3 as it has the highest weight R2 as it has the highest MED R3 as it has the lowest MED E None of the above

14 Summary Thank you