Part 4: Found an IOS bug on R5, and found why IPv6 doesn’t work over my NBMA, so I won’t be able to lab it :(

I'm thinking it has to be something on that frame switch so we'll dig into the guts of that, but I start off with R5 (not in this Topology in which you will see why), just to get SOMETHING going for R1. As you may not know from previous labs, R5 is attached to R1 … Continue reading Part 4: Found an IOS bug on R5, and found why IPv6 doesn’t work over my NBMA, so I won’t be able to lab it 😦

Part 3: Fixing the “ATTEMPT/DROTHER” issue, but still failing at the end

So through begging all over on Cisco support community and other tech forums, someone had pointed out that my running config appears to be missing the frame map statements, and I just facepalmed so hard I might have just smacked myself. Once more, if you use templates that setup "base configs" like ip addressing and … Continue reading Part 3: Fixing the “ATTEMPT/DROTHER” issue, but still failing at the end

Part 2: IPv6 / OSPFv3 configuration on Hub in NBMA, Hub stuck with neighbors in “ATTEMPT/DROTHER” state

So now we have R1 left to add to our OSPFv3 Circus, so lets get to work configuring. A couple thing to mention, that OSPFv3 still needs neighbor statements, but I don't quite remember where its config'd or what the syntax is so lets gets started: R1#conf t Enter configuration commands, one per line.  End … Continue reading Part 2: IPv6 / OSPFv3 configuration on Hub in NBMA, Hub stuck with neighbors in “ATTEMPT/DROTHER” state

OSPFv3 PtP networks, adding IPv6 addressing on interfaces, and more IPv6 info / configs in general (good stuff)

So this video I am working on now is regarding point-to-point networks, which I didn't think that if I were going from 2-3 with the SW1 between then it would be an "Ethernet segment" however R3 and R4 are directly connected via Fa0/1 so that would be a point-to-point so I may be re-covering the … Continue reading OSPFv3 PtP networks, adding IPv6 addressing on interfaces, and more IPv6 info / configs in general (good stuff)

Hex to Dotted Decimal to Binary conversion explained, and other good info to know for exam day about Hex!

Above is a Hex Conversion Template from an INE video I am watching on conversion, and I really dig the design to full explain it so I am using the same template and wanted to cite INE as the creator of the design (I think?) and for the information on conversion. It is actually used … Continue reading Hex to Dotted Decimal to Binary conversion explained, and other good info to know for exam day about Hex!

IPv6 / OSPFv3 configuration and explanation along the way!

As illustrated above, OSPFv3 (OSPF for IPv6) and OSPFv2 (OSPF for IPv4) can co-exist in harmony on one router, as two completely separate processes, without interfering with each others operation (just like our recent VRF discussion). Being that OSPFv3 is configured on an interface by interface basis, it does not use network statements in router-config … Continue reading IPv6 / OSPFv3 configuration and explanation along the way!

IPv6: Address types, Prefix-types you must know, Auto-Configuration

I am going to run through all the as brief as possible, so hold onto the seat of your pants. First up, EUI64: Every interface enabled with IPv6 on a Router needs a unique identifier, called an interface identifier, which uses what is called an EUI64 (Extended Unique Identifier). The 64 bits does not refer … Continue reading IPv6: Address types, Prefix-types you must know, Auto-Configuration

IPv6 vs IPv4 Header differences, Address Formatting, Zero Compression, and leading Zero Compression

Above, is seen an IPv6 packet Header, which contains 8 fields: Version: Equivalent to IPv4 Version field - Set to 6 obviously 🙂 Traffic Class: Equivalent to IPv4 Headers ToS (Type of Service) field, used to assign priority levels to packets (QoS) Flow Label: Has no IPv4 equivalence, Labels a packet to be in a … Continue reading IPv6 vs IPv4 Header differences, Address Formatting, Zero Compression, and leading Zero Compression