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    Friday, March 1, 2019

    Business expanding to neighboring building in same parking lot - fiber or wireless bridge? Networking

    Business expanding to neighboring building in same parking lot - fiber or wireless bridge? Networking


    Business expanding to neighboring building in same parking lot - fiber or wireless bridge?

    Posted: 01 Mar 2019 12:17 PM PST

    I'm tempted to suggest the business owner run fiber between the buildings. I know it would be a better link than wireless bridging, but I don't have any idea on the cost. The buildings are approximately 100-150 ft. apart, separated by an asphalt parking lot.

    Google Map of the 2 buildings

    Not crazy far.

    I've looked at AirFiber, and Nanostations, and will happily consider those.

    My plan with a fiber setup would be to share internet and DHCP from the main building, so there was only one router. The fiber link would go into a switch on the other side, and would simply be an extension of the current network. It would be a full 1Gbps link (possibly XG in the future). With AirFiber/Nanostation, can I still have DHCP come from the main building? Can I have the two buildings be on the same subnet? Or do I need a router to route traffic between two separate networks?

    My experience would lead me to want to have one large network rather than 2 smaller networks linked together.

    In the main building, they have a Ubiquiti Unifi setup with a USG, 3 AP-AC-Pros, and a 48-port PoE gigabit switch. Comcast business cable internet. In the new building, I'd plan on having a Unifi PoE switch, and at least one more AP-AC-Pro. In the main building, there are probably 20 computers. In the new building, probably 10 more. All-told, there are probably 50-60 total devices (including a couple cameras and guest wifi users).

    If we did a wifi bridge, would it need to be roof-mounted?

    This is a street-level view of the 2 buildings.

    Thanks for your advice, reddit.

    EDIT: Wanted to ask what others have spent running fiber in a similar setup. I would expect between $10k-20k to cross a paved parking lot, but that's just my imagination.

    EDIT 2: Thanks for all the replies. We're in the Pacific Northwest; weather is generally great with nothing too extreme. This is a children's occupational therapy clinic - the new building would be used for therapy rooms, not office work. Point being the link is not mission-critical. If the phones go down, no business will be lost. I definitely would not be recommending a backup internet provider at the second building (like I would if it were a mission-critical site).

    submitted by /u/Ubertam
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    Upcoming Sox Compliance...

    Posted: 01 Mar 2019 08:14 AM PST

    Company is working towards getting Sox compliance. As a network engineer what are the pitfalls or gatchas that I have to look out for. There is a lot of info on the web and it's making the noggin spin right now.

    submitted by /u/Ididturnitoffandon
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    Cisco Buckets vs VLAN

    Posted: 01 Mar 2019 01:41 PM PST

    Is this a fancy way to say VLANs and sale more crap to us?

    buckets dont talk to other buckets, ok. buckets need a "fusion router" to talk to each other, ok.

    whats the difference in buckets and vlans?

    submitted by /u/jollyjunior89
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    Cisco Catalyst 9300 IOS-XE Image

    Posted: 01 Mar 2019 09:49 AM PST

    Hi All,

    I have to deploy ~ 50 Cisco Cat 9300 48U-E switches in the next couple of weeks and trying to select a stable IOS-XE version. Does anyone have any issues with Fuji 16.9.2 or Everest 16.6.5? I know that there were some horrible bugs with DHCP snooping in some versions. Has this been resolved?

    Thanks

    submitted by /u/Mosquitar
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    Showerthought: Defining and enforcing the organizational standards upon which automation depends is more challenging than implementing automation itself.

    Posted: 01 Mar 2019 11:53 AM PST

    When I started down the automation path, I saw it as a purely technical challenge. I now see it as a meta-challenge involving political/diplomatic aspects, at least as challenging as the technical ones. What's your take?

    submitted by /u/austindcc
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    Where to start on the network automation journey?

    Posted: 28 Feb 2019 07:58 PM PST

    My company is starting to put focus around network automation. The problem is, automation seems to mean something different to everyone. For some it means cranking out configs by inputting a few variables, others want to see automatic network remediation while others (like myself) have written some python scripts to save time by automating mundane tasks and want a place to share with others. I just started on this team and I have a solid networking background (CCNP) and some python scripting skills. I'm wanting to get opinions from others working in a large corporation exactly how they got started down this automation path. A few things I'm interested in feedback on: -Is there a specific platform that helped (Ansible, Puppet, a Linux server to launch scripts from, etc) -What are good resources to reference? (Products/consultants/online resources/training recommendations/anything) -What were biggest challenges to the network automation journey and how did you overcome? -What are good use-cases to start with when trying to automate?

    Thanks for any and all input! I really want this to be a success just need some help on how to get started.

    submitted by /u/jdt5891
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    What's the proper way to handle DMZs & Internet Peering in a multi-DC deployment?

    Posted: 01 Mar 2019 10:43 AM PST

    Ex: Would you announce the same prefixes & have backdoor links between each of the sites for iBGP peering? Or would you advertise different prefixes at each site, use "allow-as in", and use other methods to ensure high availability/load-sharing for public facing services? (If so, what would those methods be?)

    submitted by /u/Fiveby21
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    Network related job interview questions

    Posted: 01 Mar 2019 12:44 PM PST

    Hello, so I just earned my CCNA and I've been applying to get my first networking job. I've gathered that sometimes interviewers will ask questions like "What is your favorite routing protocol and why", or other networking related questions during an interview. I'm hoping you all could share some of the questions you've been asked (or that you have asked) so I can better prepare myself. That way I can avoid looking totally stupid.

    Btw...I'm still trying to figure out how I would answer that question haha. I don't really have enough experience with routing protocols to form an opinion.

    submitted by /u/ryane244
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    What kind of patch cords do y'all use?

    Posted: 01 Mar 2019 11:26 AM PST

    I work in a company of about 600 employees spread over 5 offices globally. I came from a very large enterprise environment where things like patch cords weren't an object that got parsed over financially so we exclusively used Panduit for both copper and fiber. I feel we're in this gray area of being in between really small startup and use any patch cords we can get our hands on, and enterprise where we need reliable, quality patch cords.

    Curious to hear what people are using in their environments!

    submitted by /u/UnpartitionedEve
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    Strange loopback reachability issue

    Posted: 01 Mar 2019 01:37 PM PST

    I am running into a very strange problem that I've been pulling my hair out for the past few hours over. I operate an ISP running the following architecture. Every link in this diagram is using IS-IS for loopback reachability, then running LDP on top of that for MPLS label distribution.

    We distribute only transit (link) subnets and loopbacks into the IGP.

    We are having a strange issue where a specific loopback address (10.30.1.74) is having reachability issues from one of our core routers (Core-02). Core-01 can ping 10.30.1.74 just fine, however, Core-02 cannot reach it.

    To try to figure out what is going on, I have done the following:

    Traceroute from Core-01 to 10.30.1.74:

    root@Core-01> traceroute 10.30.1.74

    traceroute to 10.30.1.74 (10.30.1.74), 30 hops max, 52 byte packets

    1 172.16.15.2 (172.16.15.2) 15.830 ms 21.660 ms 21.762 ms

    2 172.16.15.14 (172.16.15.14) 14.914 ms 21.869 ms 27.982 ms

    3 172.16.20.177 (172.16.20.177) 19.808 ms 21.863 ms 22.025 ms

    4 172.16.22.220 (172.16.22.220) 0.943 ms 0.857 ms 0.814 ms

    5 10.30.1.74 (10.30.1.74) 1.059 ms 0.858 ms 0.803 ms

    Perfect, this is working fine.

    Now let's try that from Core-02:

    root@Core-02> traceroute 10.30.1.74

    traceroute to 10.30.1.74 (10.30.1.74), 30 hops max, 52 byte packets

    1 172.16.15.6 (172.16.15.6) 8.094 ms 21.316 ms 22.125 ms

    2 172.16.15.22 (172.16.15.22) 40.049 ms 32.727 ms 35.296 ms

    3 172.16.20.177 (172.16.20.177) 40.850 ms 42.099 ms 32.925 ms

    4 172.16.22.220 (172.16.22.220) 18.017 ms 21.872 ms 21.895 ms

    5 * * *

    6 * * *

    Ok, that's not good, it seems to be "getting stuck" between PE-02 and PE-03.

    So, as a sanity check, let's traceroute from PE-03 to Core-02:

    root@PE-03> traceroute 10.10.0.21

    traceroute to 10.10.0.21 (10.10.0.21), 30 hops max, 40 byte packets

    1 172.16.32.17 (172.16.32.17) 1.051 ms 1.111 ms 0.817 ms

    2 172.16.22.217 (172.16.22.217) 15.297 ms 18.195 ms 21.619 ms

    3 172.16.20.180 (172.16.20.180) 16.360 ms 18.245 ms 21.903 ms

    4 172.16.15.21 (172.16.15.21) 18.458 ms 20.179 ms 19.407 ms

    5 10.10.0.21 (10.10.0.21) 1.007 ms 1.078 ms 0.906 ms

    Weird, that seems to work fine.

    Now it gets even weirder. Let's change the loopback address of PE-03 from 10.30.1.74 to 10.30.1.80.

    Once I do this, no issues with reachability between any routers. Both Core-01 and Core-02 can reach 10.30.1.80 without issue.

    10.30.1.74 is not used anywhere else on my network. If I take PE-03 offline, 10.30.1.74 does not appear in the IS-IS database or LDP database whatsoever, so this is not an issue caused by duplicate routes.

    Any troubleshooting ideas on what I should try next? Sure, I can just throw away 10.30.1.74 and never use it again, but I really would like to know what's going on here, it could be a symptom of a larger issue.

    Also, please let me know if you would like me to post any additional command outputs from the routers!

    submitted by /u/neteng311
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    Ear protection?

    Posted: 01 Mar 2019 10:31 AM PST

    So I just learned that a data center can get up to 85 dB and that is well above the dB level that can damage your hearing. I just started a job and it's the first job that I actually go to physical devices (precious work was always remote) and so them offering ear plugs was kind of weird to me. But after searching I've decided to use some protection.

    However anything that's in-ear always hurts my ears. I struggle to find ear buds that don't hurt or don't just fall out all the time. So I've been shopping around for something not in-ear. I'm getting a little confused about the measurements and what I need to a room full of servers, switches, and routers. Is there anything you suggest? What level protection should I look for?

    I know this isn't necessarily networking, but it is something us networking admins/engineers/analyists need to think about so hopefully this thread can help someone else as well.

    submitted by /u/JacobGates
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    Cisco TAC alacart pricing

    Posted: 01 Mar 2019 01:01 PM PST

    Does anyone know how much cisco tac per case pricing is? If you call in with nonsmartnet can you pay for support. The reason I ask is because I have a million dollar support contract and every case I open ends up being a bug or some issue that is their fault. Feels like I am a sucker for paying for support.

    submitted by /u/w0lfg2ng
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    Public IPv4 assignment and routing

    Posted: 01 Mar 2019 02:23 PM PST

    So we are getting into the collocation business and are looking to distribute public IPv4 addresses to our clients. We have been given a a set of transit IPv4, 24.x.x.x/30 and another addressable block 35.x.x.x/29. Currently we have the 24.x.x.x/30 set to the WAN interface eth0 and have 35.x.x.x/29 assigned to eth1.

    We want all the 35.x.x.x/29 addresses reachable from the internet. How would one accomplish this without using a NAT.

    The router we are using is a Ubiquiti ERPro-8.

    submitted by /u/FunkyGnome1999
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    Power across the world and Cisco switches

    Posted: 01 Mar 2019 01:44 PM PST

    Fun one at work that I am having thrown at me now: Build a box that has a router and a switch that we can take anywhere in the world and use. Trying to figure out if anyone here has experience with power in Japan. I have searched some say parts of Japan uses US power standards and other parts use EU power any truth in it?

    submitted by /u/wraithscrono
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    Router supporting 4in6 MAP-E and PoE?

    Posted: 01 Mar 2019 01:31 PM PST

    I am looking for a wired router supporting both MAP-E 4in6 encapsulation and PoE for less than 100 $. Any recommendations?

    Edit:

    • Afaik no ubiquiti routers suppport MAP-E.
    • Not really sure about Mikrotik...
    submitted by /u/trimethia
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    Does anyone use tac_plus to authenticate Cisco devices?

    Posted: 01 Mar 2019 01:52 PM PST

    Hello:

    My company uses tac_plus to authenticate network devices against it. This seems to work fine on IOS and ASA, but I tested it against NX-OS and it didn't work. I already started doing some digging but am not finding any good explanation for why that is. I know in some implementation of ACS/ISE you have to manually add new devices, but that doesn't seem to be the issue here. Has anyone run into the same issue?

    submitted by /u/j-dev
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    WIFI and commercial oven

    Posted: 01 Mar 2019 08:53 AM PST

    Hello

    I am looking for a WIFI antenna (for VoIP) that can withstand continuous heat up to 400 degrees F (205 degrees C). It will be placed in a commercial oven, a place where we work and where our old analog phone worked. Do you know a model or an alternative? The oven is insulated steel with 6 inch walls ...

    Thank you!

    EDIT: Anything that can be wired to the outside of the oven suits me, but I do not know the right component! So I called it a WIFI antenna, it may be another therm that I should have used ...

    submitted by /u/grandflancmou
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    Juniper vSRX NAT match on HTTPS URL

    Posted: 01 Mar 2019 08:29 AM PST

    Does Juniper vSRX have the capability of matching on an HTTPS URL among other things and perform a destination NAT action?

    submitted by /u/jdlester8
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    Community network

    Posted: 01 Mar 2019 09:11 AM PST

    I've been curious about starting a network where I live. I've looked into a few things but can't seem to figure the best way to get started. I'd like to have as strong and fast a connection as possible. Can someone help me get started with this or if it's even realistic?

    submitted by /u/tampagrassfed
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    SFP-10G-SR cable length

    Posted: 01 Mar 2019 05:25 AM PST

    I am trying to run a short 1m connection between devices using two SFP-10G-SR. Cisco says that SFP does 26m but does not say "up to". Can I run 1m optics without issues?

    submitted by /u/PersonSuitTV
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    Sanity Check -- about to buy SD-WAN (Versa) for 50 sites

    Posted: 28 Feb 2019 09:44 PM PST

    We are about to buy a co-managed SD-WAN solution from CenturyLink which would use Versa's SD-WAN product. The hardware is an Intel C2558 based x86 box that Centurylink brands as its "medium" sized box. The large box is last gen Xeon D. Centurylink wants a pretty hefty monthly license fee for the boxes which includes the support and management cost.

    The hardware isn't very impressive -- single PSU, last gen CPUs, etc.

    A few questions:

    1. Does anyone have Versa from Centurylink? How is performance? How is the service?
    2. Can Versa be deployed as a VM or hardware install on other hardware? have you done this? It appears it does require Intel QuickAssist (which is on Xeon D and C3000 CPUs in the current gen).
    3. Anything else I should know before I pull the trigger on this?
    submitted by /u/ITdirectorguy
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    About BGP Session

    Posted: 01 Mar 2019 03:33 AM PST

    does bgp protocol need /32 neighbor IP to establish a session either in iBGP or eBGP?

    submitted by /u/utkuo
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    BGP Path Selection Unwanted Results

    Posted: 28 Feb 2019 06:43 PM PST

    Some of my networks are traversing a path that isn't the shortest path from what I can telling using multiple looking glass servers. Typically traffic is balanced across both of our BGP routers via pre-pending certain networks. Recently, I noticed that a handful of networks were no longer obeying what I deem is the shortest path. The BGP routers we peer with are different vendors so the only explanation I can think of is the traffic that is not be obeying, ~500mbps, is coming from our peer's directly connected network where, when traffic is sent to the peer, the local route is used. I have attached a network diagram in hopes to illustrate the issue better. How can I force traffic to use the other path?

    Network Diagram

    submitted by /u/Majestic-Falcon
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