Network Engineering Weekly Newsletter - Friday, May 29, 2015

Network Engineering newsletter

Top new questions this week: What is EtherType 9C9D? An ISP came and set up their radios the other day. After connecting my router to the radio and configuring it with the IP address, netmask, and gateway which they specified, I can't ping their gateway ... ethernet   asked by Alex D 3 votes answered by Ricky Beam 1 vote How to set a zero cost link in OSPF Can one set a link's cost to zero in OSPF? This could be desirable to force load-balancing in certain cases. For example, suppose there are four routers A, B, C, and D, and two hosts X and Y, with ... ospf load-balancing   asked by Chris Merck 2 votes answered by Mike Pennington 3 votes Differentiating OUI MAC addresses from random MAC addresses I am developing a program that creates random MAC addresses. I understand that in order to avoid collisions with OUI addresses, my addresses should "locally-administered" addresses, by setting the ... mac-address networking standardisation   asked by Oren 2 votes answered by Ricky Beam 3 votes Moving interface names on a Cisco ASA while maintaining the rest of the configuration in place My initial problem: I've run out of physical ports on my ASA 5525-X My initial solution: Create sub-interfaces on a port-channel and use a switch to aggregate my VLANs The subsequent issue: How do I ... cisco-asa   asked by Matthew Johnson 2 votes answered by Eddie 1 vote uses of STF field in the 802.11a preamble structure I been reading about 802.11a and I have come the packet structure of it The STF preamble fields is used for 1) supports the receiver for Automatic Gain Control 2) Frequency Synchronization 3) ... ieee-802.11   asked by Tyrone 2 votes Interleaver in IEEE 802.11a I have been learning the IEEE 802.11a standard in particular the physical layer design. I found out that at the data encoding stage, the data bits are interleaved using an interleaver. To make the ... ieee-802.11   asked by Tyrone 2 votes Cisco IPv6 BNG Radius Attributes I am trying to push out ipv6 unnumbered interface via radius. I am trying to do it in a similar fashion to how you would for ipv4: Cisco-AVPair += "ip:vrf-id=vrf-name", Cisco-AVPair += ... cisco ipv6 pppoe radius   asked by Firebirdnz 2 votes Greatest hits from previous weeks: What are the differences between VRRP and HSRP? Are there any significant differences between VRRP and HSRP? routing backups hsrp fhrp vrrp   asked by Bulki 10 votes answered by Yosef Gunsburg 18 votes Connecting two VLANs together on a single switch I'm doing some experiments and I want to know if it is possible to connect two VLANs on a single switch by using just a cable between one group of ports and the other. My goal is to simulate (using ... vlan   asked by bsmartins 1 vote answered by mellowd 2 votes

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