Connecting two switches together using single mode fibre and SFP’s Networking |
- Connecting two switches together using single mode fibre and SFP’s
- Why do Aruba/Procurve SFP+s cost more on FS.com
- Laura Chappell packet capture course.
- Cisco ISE and Mac IOS Device
- Firepower rant
- Get a Wave vs Purchase bandwidth from local T2
- Ipbasek9 vs universalk9 ios image compatibility issue on 3750x?
- Help with configuring a local area net
- ICMP pings from a core router reliable?
- Networking for AV
- Are there any popular science books about (the history of) networking?
- How to connect two ISP ?
- Comcast Business Routing
| Connecting two switches together using single mode fibre and SFP’s Posted: 26 Oct 2019 06:59 AM PDT One of my clients require two of their Meraki MS120 switches to be connected together. They are in separate server rooms, around 1000 meters away from each other. Obviously Cat5/6 isn't an option here, but there is a single mode fibre tie between the two locations. I don't normally work with fibre, but I was told by a friend/colleague that connecting switches together requires the use of multi mode fibre, and single mode fibre will not work (something to do with the core diameter). Is this true? I have a feeling this guy is yanking my chain. [link] [comments]  |
| Why do Aruba/Procurve SFP+s cost more on FS.com Posted: 26 Oct 2019 10:55 AM PDT J9150A and J9151A cost a lot more than the equivalent H3C Comware, Cisco, or Dell part. I was told by another vendor that it is because there is another chip in those SFPs. Does anyone know more about that or why it is that way? [link] [comments]  |
| Laura Chappell packet capture course. Posted: 26 Oct 2019 06:48 AM PDT Hi guys, has anyone if you ever went through Laura's 6 CD packet capture materials? Are they any good now? [link] [comments]  |
| Posted: 26 Oct 2019 07:37 AM PDT What is the most common and recommend way to deal with wired Mac books or any other Mac devices for dor1x? For windows I always use PEAP Member of Domain Computer. I can't use it for Mac because they are not part of AD. Is it EAP-TLS? If so how do you push the cert to them on a massive scale? [link] [comments]  |
| Posted: 25 Oct 2019 06:48 PM PDT This is the rant provided by a disgruntled user about Firepower: https://www.reddit.com/r/networking/comments/9363af/cisco_firepower_rant/ I have been working with Firepower for the last 3 years, and i can't underline any of the statements in the rant enough. There is just no redemption from this pile of crap. What experiences have you guys been having over the last year or so? I'm talking 6.4+ I see Cisco avoiding tech guys in our firm as much as possible, and only selling to the management team. Luckily I have attention from mgmt, but you guys might not be as fortunate. My 2 cents; avoid Cisco Firepower in any case possible. It's not worth the pain. [link] [comments]  |
| Get a Wave vs Purchase bandwidth from local T2 Posted: 26 Oct 2019 01:04 PM PDT In a very rural area, 300 miles from any carrier hotel and paying $6k per month for 2.5Gbps. There are two providers in the area that have fiber networks from here to KC and STL (Centurylink and Shoeme Electric). We are having a horrendous time with with outages and billing problems on Centurylink and I'm looking to make a change. Any educated guesses on what a 300 mile wave might cost in MO ? I'm thinking that if I got a Wave all the way to the carrier hotel in Kansas City or St Louis (both aprox 300 miles from here) then I could buy bandwidth from T1, say Hurricane Electric for example, for pennies per Mbps. I know a wave isn't cheap but I have no clue what kind of expenses I'm looking at so not sure when paying a little under $3.00 per Mbps becomes more expensive than 300 miles of wave and pennies per Mbps. So far talking to Shoeme power has been very unproductive as they pretty obviously do not want to sell me a wave and have been just super difficult to get any information from them for anything other than just buying internet from them instead of Centurylink. They want $11,000 just to bring their fiber aerial, they own the poles, from across the street so I can buy internet from them instead of Centurylink. I don't really know exactly what to ask for and they don't volunteer any information. [link] [comments]  |
| Ipbasek9 vs universalk9 ios image compatibility issue on 3750x? Posted: 26 Oct 2019 07:29 AM PDT Tried upgrading the software on a switch that came with a ipbasek9 image with a universalk9 image and it wouldn't boot the universalk9 from flash. Is that to be expected? I'm still trying to understand the licensing. Do I have to use an ipbasek9 image on this switch? Or am I possibly doing something wrong? I copied the universalk9 bin to flash:, made sure flash was initialized and have tried to force it to boot from that image several times but it always errors out. Its in rommon now so I'm going to have to try and boot a good image from a USB because for some dumb reason Cisco took away tftpdnld on the 3750x switches... [link] [comments]  |
| Help with configuring a local area net Posted: 26 Oct 2019 04:11 PM PDT Hi! I am trying to set up a LAN on my university dorm and i can't seem to figure it out. My dorm has two Ethernet ports wall mounted. These correspond to static IP addresses that our administrator provided. Let's say that port A has x.x.x.25 and port B x.x.x.13. I want to be able to have wifi and ethernet on my dorm from either those ports and plug many computers and or smartphones. I have tried using two different old routers. The zte h27n and zte108l. They are both dsl routers but the first has a wan ethernet port which you can also use as a standard lan port. Firstly, tried creating a static wan connection with the settings from our network administrator including default gateway, subnet mask and dns. Then i bound this, to the wan port. Second, i disabled dchp on that wan port and enabled on the other 3. But no luck. Then i tried the same with zte 108l also with no luck. I feel i am missing something. All i want is to route all my traffic from my local devices to either .25 or .13 ip addresses. Is my only option to get an actual switch? [link] [comments]  |
| ICMP pings from a core router reliable? Posted: 25 Oct 2019 06:18 PM PDT i get that ICMP traffic especially around peaktimes can be finicky, but i've been seeing 3-7% loss at a cross connect that they dont seem to see an issue with. (cross connect directly off this core) no errors are incurring on the link. any thoughts/ideas? [link] [comments]  |
| Posted: 26 Oct 2019 03:22 PM PDT Hi I work as a sound designer in theater and have done the Dante Training levels 1-3. I was just wondering if anyone here works as a network engineer for live events and what your experience has been like? Also, what would you recommend for farther education for networking? [link] [comments]  |
| Are there any popular science books about (the history of) networking? Posted: 26 Oct 2019 02:57 AM PDT I've entered the networking profession a few months ago after migrating from being a SysAdmin. As most of us will agree, networking and its history is fascinating. As such I wonder if anyone can recommend me any popular science books about networking and its history. While there is an abundance of books about subjects with similar historical importance (from flight to space travel to programming), I haven't been able to find any high quality books about networking. The reason I personally ask is twofold:
Any tips? [link] [comments]  |
| Posted: 26 Oct 2019 08:50 AM PDT I am trying to solve a study case for my college, but I got stuck in a point, maybe someone could help me:
This is my topology: Isp tier 2 uses rip as a routing protocol, and the orange"isp 1" uses ospf, my doubt is how I will configure static route to interconnect both isp ? should I configure a static default in orange isp and redistribute in ospf ? thanks a lot.. [link] [comments]  |
| Posted: 25 Oct 2019 05:58 PM PDT I am helping out a small business with a routing issue and I just can't seem to figure it out. Hopefully you guys can help me out. They are using Comcast Business Gateway. Public IP: a.b.c.250 Public Gateway: a.b.c.249 Attached to the Comcast Modem Port 3 is a router. On the Comcast side it has an IP of: 10.1.10.10, on the router side it has an IP of 192.168.0.1. Attached to that router is a switch. The router side of the switch has an IP of 192.168.1.1 and the switch side has an IP of 192.168.1.20. There is a device plugged into the switch with an IP of 192.168.1.241. The device communicates with a 3rd Party for monitoring over ports 3000-3050. I also have a Windows PC plugged into that switch with an IP of 192.168.1.240. I can get out to the internet just fine from the Windows PC. So, I am assuming that the 192.168.1.241 device can as well. However, the 3rd Party Monitoring Company is not able to establish a connection with the device. If I plug an additional computer into the switch, I can ping everything on that switch. I plug into the router, I can still ping the devices. However, once I plug into the Comcast modem I can no longer ping anything on the 192.168.0.0/23 network. I created a Port Forwarding Rule for Ports 3000-3050 to forward to port 10.1.10.10 and I created a Static Route with the following values: Destination IP: 192.168.0.0 Subnet Mask: 255.255.254.0 Local LAN Gateway IP: 10.1.10.10 Applied the settings, even rebooted the Comcast Modem and I still could not get over to the 192.168.0.0 network. A trace route from the Comcast Modem would go: 10.1.10.10 --> Time out --> 90.x.y.z then die. Comcast told me their modem is in "Pass-Through mode" but won't help me beyond that. Any tips/tricks/suggestions are more than welcome! Thank you in advance! [link] [comments]  |
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