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A RP, B GP, I C MP It’s easy as 123

A RP, B GP, I C MP It’s easy as 123. How to find your MAC address(es). Why plural? Each adapter has its own MAC address. ifconfig -a. XX:XX:XX : YY:YY:YY. Vendor ID. Interface ID. Cisco owns 00:90:B1 00:90:2B 00:90:86 00:90:92 …. Intel owns 00:90:27 00:A0:83 00:A0:C9 00:AA:00

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A RP, B GP, I C MP It’s easy as 123

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  1. ARP, BGP, ICMP It’s easy as 123

  2. How to find your MAC address(es) • Why plural? • Each adapter has its own MAC address ifconfig -a

  3. XX:XX:XX:YY:YY:YY Vendor ID Interface ID Cisco owns 00:90:B1 00:90:2B 00:90:86 00:90:92 … Intel owns 00:90:27 00:A0:83 00:A0:C9 00:AA:00 …

  4. Routing on MAC Addresses CC:CC:CC:CC:CC:CC AA:AA:AA:AA:AA:AA H3 H1 1 S1 S2 3 2 H2 BB:BB:BB:BB:BB:BB Learning Switch Routing Table for S1

  5. Q1: Panda Express 44-44-44-55-55-55 F0-0D-F0-0D-F0-0D 22-22-22-88-88-88 P LAN 1 LAN 1 192.168.0.1 Panda Router 192.168.0.5 Kay 65.91.7.210 65.91.53.96 Router (Port 2) K PE 192.168.0.100 Router (Port 1) BE-EF-BE-EF-BE-EF Panda Express C0-FF-EE-DE-CA-FF

  6. Internet Control Message Protocol (ICMP) • Communicate Network Layer information • Two uses 1) Diagnosis (Error reporting) 2) Discovery • Examples: • Ping/pong • Destination network/host/port unreachable • Source quench • Router advertisement/discovery • TTL expired, Bad IP header, Need fragmentation…

  7. Ping ping www.google.com

  8. Traceroute TTL Expired traceroute www.google.com

  9. Tracepath Need Fragmentation (PMTU Discovery) … tracepath www.google.com

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