TX Bursting and Packet Aggregation Networking |
- TX Bursting and Packet Aggregation
- LAN QoS without policing
- PCI Compliance - Physical Security Requirements
- HIGH AVAILABILITY + STACK Config SETUP
- I can't seem to understand the OSI model.
- Spanning Tree Question
- DNS Latency Impact on IPv6
- How does a website determine what DNS servers I'm using?
- Help!! Ubiquiti NanoSwitch + 2x G3 Pro setup (network diagram included)
- How do "IT professionals" record their DNS requests?
| TX Bursting and Packet Aggregation Posted: 12 May 2019 10:57 AM PDT In wireless routers and when connecting via Wireless N to the 2.4ghz band, do you enable or disable TX Bursting and Packet Aggregation? [link] [comments]  |
| Posted: 12 May 2019 05:30 AM PDT Hi, Sorry for noob questions but I have been reading about qos for a long time and trying to grasp it. I have simple LAN topology in one of our sites: PC-->2960x-->4506-->MPLS router(with qos enabled)<---Nexus<---SfB server I'd like to implement qos only for Skype for business - our sysadmin has enabled dscp marking on the PC's and SfB - voice gets DSCP 46 and video 34. I have tested it via iperf and ping with tos values - markings are preserved end-to-end. My understanding is to do 1p3q3t on the 2960x(thats where they can run out of bandwidth) and only put dscp 46 in threshold 1 and dscp 34 to priority queue threshold 2. Rest of the traffic will go to other classes as specified in the recommended 1p3q3t design. I am puzzled when it comes to the policing - do I have to do it? From my understanding if buffers and thresholds are divided less important dscp values will get dropped. So if the buffer is full priority queue will get served first and q4 will get dropped and then q3 and so on? If that's correct understating - why do we need policing on the physical interface at all? [link] [comments]  |
| PCI Compliance - Physical Security Requirements Posted: 11 May 2019 04:10 PM PDT Good afternoon all, I recently started at a very small shop, however, they are required to become "more" PCI compliant. I believe our existing level is ~6% overall... which is incredibly scary. I'm using this to my advantage to make things suck less... for example, one switching closet does not have a door...or a roof (open concept layout). It is just an open room accessible to staff and the public freely, with a switch connected to our (currently) flat network, with male ends on every cable plugged directly into the switch. They are old and beginning to fall off, so simply moving anything drops multiple connections. Fun times. With PCI compliance -- I know part of the basics is physical security to the gear. If I were to put a patch panel in, and wall mount both it and the switch -- would I be able to simply put a 4U wallmount rack for the gear and add a door to the room, and be good to go? Or, because there is no ceiling, does that make the door a moot point? Option #B is forget the door, get a locking cabinet, and be done with it. Thanks in advance! [link] [comments]  |
| HIGH AVAILABILITY + STACK Config SETUP Posted: 11 May 2019 09:11 PM PDT Hi Guys in line with my post weeks ago. https://www.reddit.com/r/networking/comments/bbjw5s/need_advise_for_this_setup/ I've decided to finalize the network upgrade with this setup thanks to s /u/golle i will run stack on the two switch instead. . See topology below. Now im still unsure if understand stack concept properly. I assume stacking is the same as HA in fortinet ? with both device as active active. So if i use for example of SW1-TG1 for specific config SW2-TG1 will adopt the same config and role as SW1-TG1 so i cant be use anymore in different role? And also since im planning to run port channel on the access-SW connecting to the STACK-SW with only 2 physical links can i do it this way? (refer to diagram) Notes: since WS-C3850-24T does not support 4+ 10 G modules we're planning to get 2 WS-C3850-24XS instead. Thank you very much, [link] [comments]  |
| I can't seem to understand the OSI model. Posted: 12 May 2019 03:14 PM PDT I hate to ask this question, but I've been quite confused on the application layer of the OSI model. Some resources describe that the application layer is concerned with the end user and their use of the application (Google Chrome and Safari as an example ) and others describe that It's concerned with the protocols involved in providing the network services (HTTP and FTP as an example). I'm not particularly sure what's right here. [link] [comments]  |
| Posted: 11 May 2019 04:25 PM PDT Just wondering if someone could clear up a spanning tree question we have. Say you have the following Layer 2 network, we will assume only a single VLAN is used throughout... Assuming all switches are managed (say Cisco), if you only enable Spanning Tree on Switch 1 (Root Bridge) and Switch 2 but not on Switch 3 and Switch 4, do the BPDU's just "passthrough" Switch 3 and Switch 4 without being processed, or is disabling spanning tree similar to a Deny ACL for BPDU's? If the BPDU's are just passed through, is it safe to assume that Switch1/2 will detect the loop and shut down the uplink to either Switch 3 or Switch 4? [link] [comments]  |
| Posted: 11 May 2019 05:09 PM PDT Backstory: ISP with all customers running Dual-Stack, 10% of customer traffic is IPv6 Currently we have our customer DHCPv4 Pool set up to use our DNS Resolvers but do not have our DHCPv6 pools pointed to us, they are pointing to Google's. The latency delta between the two are around 10ms. I know that not all of the customers devices are using IPv6 (Smart TVs or older hardware) but has anyone tested out the latency impact on the preferential treatment of IPv6 based on DNS alone? I'm working to move the v6 pools over to our own DNS anyways, but this has me wondering if this will help to shift the load? For those who say "who cares", these customers are CGNAT'd [link] [comments]  |
| How does a website determine what DNS servers I'm using? Posted: 11 May 2019 11:06 PM PDT And similar sites that offer that service. Strait to the point, from a networking stand point, how does this work? Thanks! [link] [comments]  |
| Help!! Ubiquiti NanoSwitch + 2x G3 Pro setup (network diagram included) Posted: 12 May 2019 01:02 AM PDT |
| How do "IT professionals" record their DNS requests? Posted: 12 May 2019 02:35 AM PDT Hi everyone, this is not an Home Networking question, nor a career/certificate one, so idk exactly where to ask it. How would you record the domain your DNS requests? I'm actually using tcpdump with a regular expression, but maybe there are better ways (as I'm not an expert). Here is it:
Ty in advance! [link] [comments]  |
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