Client wants to extend L2 over Dark Fiber thoughts? Networking |
- Client wants to extend L2 over Dark Fiber thoughts?
- Splitting 50-80km dark fibers with CWDM?
- What could cause a lack of arp replies?
- The Phoenix Project
- Tagged to Untagged VLAN Question
- Port Mirroring behavior on Cisco Switch
- Nokia certifications - comparison to CCIE
- OSPF over GRE
- Network setup with one static IP
- Network ping/tracert test
- Cisco C160 ironport
- Router, unmanaged switch, managed switch
- A Chat request Stream
| Client wants to extend L2 over Dark Fiber thoughts? Posted: 03 Mar 2018 09:32 AM PST Hello, I have a client that has an on-site server room which contains a small collapsed core of Catalyst 9500 and hyper-v cluster running Nexus 9300 as TOR. The building next door to the customer is a large DC that has a direct fiber conduit running to the customers building. The customer purchased two fiber pairs to the Colo rack, and I am in the process of setting up DWDM equipment. The original plan was to migrate the VLANs used on the Nexus hyper-v and storage while fork lifting the entire server setup to colo, then simply routing between colo and on-site core (about 800 users). In the process were also getting another set of Catalyst 9500 at the colo as the second core for MACSEC purposes. Long story short, last minute customer wants to span the VLANs across the dark fiber. The fiber itself is about 0.3 miles distance with no real latency. The customer is insisting with there three "network" guys on staff to do it. They want to have the hypothetical ability to provision local hyper-v cluster in the future to do hyper-v equivalent of VMotion, and other L2 adjacency requirements such as slowly migrating existing VLANs on site to brand newly routed VLANs at the colo. We offered the client to do an ASR setup with OTV which we have had good experience with, we offered VXLAN BGP EVPN. Admittedly these are more complicated solutions then needed for a customer this size. The customer has other locations but there correctly setup as routed interfaces. Anyway, I would like to hear peoples thoughts. Honestly, we are against this, but I like to hear opinions or options were missing. [link] [comments]  |
| Splitting 50-80km dark fibers with CWDM? Posted: 03 Mar 2018 03:08 PM PST We have three dark fibers leased from our ISP, and was wondering how well it would work if we added CWDM MUX/DEMUX to both ends? We'd need one to three connections more between these sites and our main campus. Can I just get the cheapest CWDM boxes from FS.com or should I consider something else? Which channels should I use? Current RX powers from the switches: First two are 10Gbase-ER optics and the last one ZR. Though I'm quite sure the actual fiber run to site 2 is almost 80km... Other two are 60km and 55km from the main campus (just looking from the map, the actual fiber run is of course longer) Any ideas? Thanks! [link] [comments]  |
| What could cause a lack of arp replies? Posted: 03 Mar 2018 04:10 PM PST For some reason, a new link we're trying to bring up is not working. When I do a tcpdump on the interface, I see that both our local device, and our distant end router are sending out arp requests trying to find eachother. But neither are replying. What could cause that? I was thinking since I at least see the distant end request, layers 1 thru 2 has to be good. Why won't either side reply though? Any advice? Thanks! [link] [comments]  |
| Posted: 03 Mar 2018 03:29 PM PST I just finished The Phoenix Project and thought it was awesome. One part had me curious though. The main character, an IT director in a medium sized business, is told by his CEO that the future career for senior IT leaders rests in the COO position. I find this interesting given traditionally the next step has been CIO. Do you think that this is accurate with the growth of cloud services and being able to jump between development/operations? Are there any current COO's or CIO's who can elaborate? [link] [comments]  |
| Tagged to Untagged VLAN Question Posted: 03 Mar 2018 07:24 AM PST So I have a pretty good understanding of vlan tagging and untagging, but what confused me recently was how the following worked in a business and I was hoping someone could shed some light on how it works. A cable comes from a port that has the default server & workstation traffic on VLAN 10 and we plugged the other end of the cable into a new switch that we was untagged on VLAN 1. We were kind of surprised that everything started working and communicating through the connected cable right away. I would have throught we would have had to VLAN tag the entire new switch on VLAN 10. Is there something with VLAN that I am missing on how it works in this case? [link] [comments]  |
| Port Mirroring behavior on Cisco Switch Posted: 03 Mar 2018 02:42 PM PST Hi Folks. I recently tried some stuff with SPAN and RSPAN on some Catalyst 3750 in a lab, and saw this behavior: I was running one local SPAN and one remote SPAN session on the same switch with just one uplink. The RSPAN was mirroring traffic from an Access Port where a PC was connected. The local session was mirroring on the uplink port. My Laptop was connected to the port configured as the local SPAN destination and running Wireshark. When the PC was issuing Pings to devices connected on other switches (going over the uplink), my expectation was to see every single Ping twice. Because the local session was mirroring the uplink (trunk) and I thought I'll see the traffic for the ping AND the traffic for the RSPAN session.. But i only saw the pings once.. no traffic from the RSPAN session was captured. Pings and RSPAN session were working though.. I also saw the pings on the machine behind the RSPAN session. Why didn't the local session capture the remote SPAN traffic?? [link] [comments]  |
| Nokia certifications - comparison to CCIE Posted: 02 Mar 2018 11:27 PM PST I've been looking at the Nokia/ALU certifications, and I wondered if anybody here has experience with them. It looks like a valid CCIE number gets you credit for several of the exams. It also looks to me like their NRS-I is equivalent to CCNA. NRS-II has a 3.5 hour lab exam and several written exams, so it looks about like the CCNP would look if it had a lab exam in it. Then there's the SRA which appears to be a CCIE/CCDE hybrid equivalent. Have you taken any of these exams? If so, did you find them to be comparable to cisco exams? Is my surface-level assessment here accurate? [link] [comments]  |
| Posted: 02 Mar 2018 11:15 PM PST So I have 3 datacenters that are all connected by a L2 Gig network. Each location has it's own subnets and needs to access resources at the other locations. Easy enough. Problem is that if the L2 wan is down, the sites can't talk to each other, so i want to setup OSPF to fail over to a GRE tunnel that exists on a separate gateway device at each location. The routers are actually linux Quagga. Currently they are all static routed to each other and it's fine. But if I switch to ospf then does each logical location get it's own area, in addition to the backbone being area 0. Should ospf be able to handle switching the routing from the wan to the tunnel or am I making this harder than it really is.. [link] [comments]  |
| Network setup with one static IP Posted: 03 Mar 2018 03:23 PM PST I have a networking question that I know has an answer, but I cannot seem to understand solutions. That or I don't know what to Google. I have a public static IP line from Spectrum Business that was installed to monitor a HVAC system. The computer used for HVAC control is set up and online, but that seems to be the only device I can add to the network. The IP address assigned to that computer is the public IP Spectrum assigned to us. I'm trying to figure out a way to get the Ubee modem/router to assign IPs with DHCP, but when I connect to the router's Wi-Fi, I can't even access the router's UI. I've been searching Google and YouTube for tutorials on how to set up a static IP network, or even one with additional DCHP control on top of one static IP, but the two don't seem to mix. Any ideas? [link] [comments]  |
| Posted: 03 Mar 2018 03:15 PM PST Let's see how to verify your internet connection with ping and tracert: [link] [comments]  |
| Posted: 02 Mar 2018 09:49 PM PST Anyone have experience with these devices? I've read the c170's can be flashed with a dell equivalent BIOS, but there's not much information out there on that for this model. I believe its the hardware equivalent of a Dell R200? Thanks in advance! [link] [comments]  |
| Router, unmanaged switch, managed switch Posted: 03 Mar 2018 07:51 AM PST If I have an unmanaged switch between a router with virtual vlan interfaces and a managed switch, will the unmanaged switch be able to pass along the VLan ID to the managed switch? [link] [comments]  |
| Posted: 02 Mar 2018 09:47 PM PST I had a fun(?) idea for a twitch stream where the chat controls the topics covered. So the idea is that I'll cover whatever comes up, as long as I'm able to explain it / lab it in the stream. So if you want to ask a question / challenge me then checkout twitch.tv/PacketThrower tomorrow, I'm not sure when the stream will start but I'll post out notice before. Should start around 1:30 MST ——- Mod note: I'm thinking of a better way of doing these announcements that is less...spammy but since this is the first one I'll see how this goes. [link] [comments]  |
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