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Wombo

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Everything posted by Wombo

  1. I've seen issues in the past with some of the ASUS suite of tools. If you installed any of these I would try removing them for the time being. Specifically the issue I saw in the past was related to AISuite which was causing the router/AIO to reboot whenever the PC was on. An easy test is turning the PC on and enable safe mode with networking. If this works just fine it's likely an application or process causing the issue.
  2. Here are two packet tracer labs I used to practice back when I took my CCNA. If you can complete all the tasks you should be all set for the real exam as it is slightly more complex than anything you are likely to encounter for this level. I have also included the completed topology, in the event you need it for reference. I should also note these were last updated in late 2014 and haven't been revised for the latest revision of the CCNA R&S, but most of the topics should be there. Cisco2SBAJune2014Configured.pkt Cisco2SBAJune2014.pkt Edit: Forgot to quote! @ilyas001
  3. Can we please see some traceroute results.
  4. I would not recommend BGP for this. BGP is not meant to be an IGP and really shouldn't be looked at as a protocol that supplies any kind of reliable failover. BGP is for route replication across the entire internet, by design it is VERY slow because of this. If your network is segmented into spans no greater than 8 devices in a chain you should be good to stay with layer 2 protocols such as STP. If you branch out to anything larger I would recommend going to a routed layer 3 design with a good IGP such as OSPF, IS-IS or even EIGRP if you find enough platforms that support it. If complexity is low you should stay with Layer2. As complexity increases, move to a layer 3 design that bridges the layer 2 segments together and handles the routing/redundancy. As spans increase, implement optics (layer 1). As you start to get into a larger network designs all 3 elements will have to be considered. The most typical modern service provider designs will involve layer 2 for transport and layer 3 for routing/redundancy with optics spanning the long haul. As an example, modern service provider MPLS networks involve layer 2 transport, typically Ethernet, with routing choices for these layer 2 frames performed via higher levels protocols such as OSPF at layer 3 for finding the best path between nodes. One way I like to think about it is every time you step closer in the network view you go deeper by 1 layer. At a high-level you have the layer 3 routed design showing the paths between nodes and peers (Ex. router-router). As you go in deeper you see the layer 2 paths between the network elements, typically the MPLS paths for forwarding traffic between layer 3 devices. Going deeper yet you find the layer 1 paths between your devices, these would be the physical optical links, or in this case, wireless shots. BGP, as its name implies, should really only be used at the network border for route advertisement and replication to the greater internet. BGP is not an IGP.
  5. Availability of 150 on their network, not reliability or up time. I'll update my post for more clarity.
  6. See Rate Limiting, primarily what is often referred to as Policing. As per wiki; "In computer networks, rate limiting is used to control the rate of traffic sent or received by a network interface controller. It can be induced by the network protocol stack of the sender due to a received ECN-marked packet and also by the network scheduler of any router along the way." "The recipient of traffic that has been policed will observe packet loss distributed throughout periods when incoming traffic exceeded the contract."
  7. Despite being called "Optik" the services provided by Telus under that branding are not guaranteed to be transported over fibre optics and Telus will tell you that no such correlation is being implied despite the naming convention. Got to love marketing... Telus infrastructure for residential (and even enterprise sadly) is mostly old copper telephone lines. While it is true these do give you a slightly higher degree of separation from other users they are also a lot more susceptible to issues caused by the legacy technologies used for transport over these lines, not to mention the fact the lines are extremely dated and are prone to physical issues themselves. Additionally, your traffic is almost guaranteed to be aggregated with others past what is called the HLU, so the separation doesn't go too far. Cable technologies, or DOCSIS, have come a long way over the years. It is true the bandwidth is shared however the number of channels available on DOCSIS 3.1 systems makes this somewhat of a mute point. You're dealing with bandwidths in the tens of Gbps on a single multi channel bonding. Don't look for this being offered anytime soon, but DOCSIS 3.1 is boasting throughput of over 10Gbps to individual subscribers over short/medium distances. As a bit of information I've gathered over the years, all of Shaw's cable nodes are FTTN, this is often called hybrid fibre/coax. Each node then has redundant fibre uplinks to a larger cable chassis that routes traffic over a larger fibre backbone, and ultimately to the internet. The individual coaxial cable runs themselves are not that long. To go back to the OP's point about the offerings, if we want to compare Shaw to Telus, the two major ISP's in Western Canada, Telus can barely offer 150 to 15% of their users. Shaw is reporting the service is available on over 98% of their network, with the total number of nodes showing signs of saturation at 0.03%. Enjoy
  8. Not really a bug, that's just the limitations of WiFi. You can try; Choosing a more open channel, try to stay on either 1, 6 or 11. Moving your Wireless AP into a more open area Removing obstructions between your WiFi antenna and the WiFi AP If your AP supports it, replace the antennas for ones with a larger gain/power If your AP has multiple antennas, orientate them to be at 90degrees to each-other (if one is vertical, place the other horizontal, if you have 3, angle one in between)
  9. Not really a bug, that's just the limitations of WiFi. You can try; Choosing a more open channel, try to stay on either 1, 6 or 11. Moving your Wireless AP into a more open area Removing obstructions between your WiFi antenna and the WiFi AP If your AP supports it, replace the antennas for ones with a larger gain/power If your AP has multiple antennas, orientate them to be at 90degrees to each-other (if one is vertical, place the other horizontal, if you have 3, angle one in between)
  10. I would just buy a regular unmanaged switch. While the managed one will likely have more features that could be used in the future if you ever needed them, the added price premium isn't going to be worth it if you don't plan on using those features. Avoid hubs/dumb switches as they will introduce an excess of issues and will degrade network performance.
  11. That would be managed switch, unmanaged switch, and hub/dumb switch.
  12. Switches make intelligent forwarding decisions based on layer 2, typically mac address. A hub has no concept of addresses of any kind and just broadcasts everything out every port whenever it receives a frame. Even that is technically incorrect as they doesn't even understand frames, they only understand electrical impulses and how to replicate them. Hense why some people call them dumb switches because they can be used in place of a switch but they have no intelligence whatsoever and are, well, a dumb choice as they effective make full-duplex communication impossible.
  13. Managed Switch > Unmanaged Switch > Dumb Switch A "dumb switch" is a hub, not a switch at all.
  14. Wombo

    Snort

    Short answer, yes. I'm really not sure if snort can do this, but then again I've never gone deep into it, so it may be possible.
  15. Wombo

    Snort

    Unfortunately I don't have any actual first hand experience with snort. I've also never really heard of snort being used specifically as a DoS mitigation tool, I suppose the packet inspection aspects of it would lend itself to being somewhat usefully for DoS protection. As @leadeater eluded to however, this isn't going to help in the event of bandwidth starvation type attacks. The only way to beat bandwidth starvation is with more bandwidth and a whole lot of scrubbers.
  16. Sounds a lot more like a dieing router/AIO than your ISP, but it's always a good idea to contact them and ask them to verify your service form their end, particularly during the time that you are seeing the issues.
  17. A good point to make, this would be covered by the alhpa/beta decay statement however. Regardless, a good example of everyday radiation we are exposed to, and a a far more harmful version of radiation at that, however still relatively meaningless. Radon is an element, it is the heaviest and only radioactive Noble Gas on the period table at this time. Radon is natural found in extremely small quantities in various soils around the world. Even with radiation from Radon decay coming to light, the levels are extremely low. Odds are you receive more radiation from Bananas than Radon. Yes bananas are radioactive.
  18. The notion that the EMR used to transmit data in wireless networks is somehow dangerous is quite frankly moronic, and shows an extreme amount scientific incompetence. Wireless signals from access points for Ethernet networks use a similar frequency to that of microwave ovens, at least when we talk about the 2.4Ghz spectrum. Have you ever pulled your food out of a microwave and thought "is this radioactive?", I sure would hope not. At a basic level a microwave heats food by causing the water molecules in the substance the oscillate. So with that said, yes, the same thing does happen to you with wireless waves, however, microwaves have capacitors that run the magnetron in the thousands of watts. Access point, by design and by regulation, may not exceed 1 watt. Most often, you're looking at power factors in the mili-watts. Secondly, the standing wave produced by a wireless access point doesn't actually contain enough power to cause a water molecule to oscillate, this requires FAR more power, and is why the aforementioned microwave ovens run in the thousands of watts. I should also add here it isn't the wave itself that oscillates the water molecule in a microwave, it is the fact that water is a polar molecule, and therefore will oscillate to keep itself in the correct phase as the field changes. Technically you could achieve the same result by moving a magnet around really fast. My final note, and probably the most important thing for everyone to remember is that the term radiation does not imply danger. Nuclear radiation, or alpha/beta decay is highly dangerous and is what people most often associate to he term radiation. Even then tho, it isn't that simple, if you have a smoke detector in your house, say hello to radioactive decay keeping it running! When it comes to wireless signals, we are actually talking about Electro Magnetic Radiation. This can range everywhere from waves as tall as mountains, to waves so small they can rip electrons from atoms. In the middle you have visible light which is a form of Electro Magnetic Radiation. Thirdly, thermal radiation anyone? Ever stood next to a stove or a fire? Radiation in itself isn't harmful, and often times serves a very essential purpose, such as allowing us to see in the case of visible light within the electro magnetic spectrum of radiation. The type of radiation you need to avoid is what is called ionizing radiation, or the types of radiation that can interact with subatomic particles such as electrons and protons. Wireless signals from radio towers, wireless access points and cellphones, just aren't dangerous. They have been around for more than long enough for adverse affects to be seen and as I'm sure you're aware, there aren't any. If you do believe you suffer adverse affects from the radiation released from wireless devices, need I remind you that visible light contains more energy than wireless access points. Additionally, a wireless device in your home pales in comparison to all the other forms of radiation flying through you at all times of the day. If you really feel that there is something to it, start wearing a tinfoil hat and let us all know if the Faraday cage helps you to feel better.
  19. Sadly, that's he nature of CGN. Sure there are some options, but really it comes down to what your ISP is willing to do for you. The easiest thing to do is unfortunately just to pay the $10. Perhaps if you explain the nature of your needs to your ISP and explain their service doesn't support you int he right ways, they may be willing give you discount.
  20. I answer the call. Hmm, intriguing. I like to think I have domain over layer 3 and under, and a bit of layer 4. Once we start hitting those higher layers I tend to fall by the wayside. I'll get the packets to you, but it's up to you what you do with them! I'm familiar with the concepts we are discussing here, but not in the implementation. I could definitely help if there's any routing concerns/configs for routing/high-availability protocols, but I'm a bit lost with the rest. I think you're handling this one far better than I could!
  21. The 200Mbps refers to the total switching capacity of the switch, often called "back plane". This is the bandwidth of the internal bus that moves the packets between each interface. So while it has 5 10/100 ports, so theoretically you could put 1Gbps (500Mbps full-duplex) through it, the switch can only only actually handle "switching" up to 200Mbps of packets. Another way to think about the 200Mbps of this product is that each interface can do 100Mbps in and 100Mbps out, that's already your 200Mbps. This switch can't even handle two interfaces communicating with each other at full throughput. The switch does look very sub par, get a gigbit switch. The only thing I'm noticing is that there is no power cable shown, if the device is passively powered or PoE powered, then this device does look kind of neat. However a gigiabit switch will get you further.
  22. Now I could be wrong, but that very much looks like an RG6 coaxial cable.
  23. Wombo

    Rubberbanding

    Packet loss and induced delay because of WiFi. Solution? Don't play on WiFi, or optimize your wireless and ensure you are operating and the most open channel available. It probably won't completely solve your problem, but it might make things better.
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