February 8, 2016 by James

IPv4 ARP

ARP – RFC 826 Proxy ARP – RFC 1027 ARP request is sent with required IP as the Target, and the Target MAC address field set to all-zeros.

February 8, 2016 by James

CCIE v5 Tracker

  1. LAN Switching ☐ 1.1. VLANs & Trunking ☐ 1.1.1. Standard VLANs ☐ 1.1.2. Extended VLANs ☐ 1.1.3. VLAN Database ☐ 1.1.4. Access Ports ☐ 1.1.5. 802.1q Trunk Ports ☐ 1.1.6. 802.1q Native VLAN ☐ 1.1.7. Dynamic Trunking Protocol (DTP) ☐ 1.1.8. Trunking Allowed List ☐ 1.2. VTP ☐ 1.2.1. VTP Version 1, 2,…

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July 3, 2013 by James

Migrating from IOS to IOS-XE – interface rate-limit

Historically I've used simple access-lists and interface rate-limit commands to act as a backstop preventing the network being overwhelmed by runaway traffic flows (UDP from DNS reflection attacks being the flavour of the month). On standard IOS boxes (7206-NPEG2 in this case) it was quite simple to follow the recommendations in the secure IOS template…

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