Rant Wednesday! Networking |
- Rant Wednesday!
- VLAN automation script
- Are there third-party alternatives to the Cisco SSD for Catalyst 9300s yet?
- 802.3bt switches
- Traffic Generator with tunnelling support
- Cisco ISE
- Is it unreasonable to expect my ISP to provide an aggregate link from the fiber switch to my firewalls?
- Retiring a Cisco 6504e. Replacing with a C9500-48Y4C
- Rack Depth Issues - Any Workarounds?
- I may have found the two generals problem solution ?
- Check Point SSL VPN Extender (Java)
- [D] PTP Protocol + 10 Gigabit Switch?
- Cloud hosted Webex latency at Ashburn DC, Zayo upstream- anyone else affected?
- rndis usb to ethernet interface?
- Looking to find OID's for Aruba 2930M switch
- Replacing our core stack
- ISE CLI password
- ISR4331 Throughput
- Checkpoint failed policy instalation - need to find log data
- Top of Rack SFP+ 10Gbe switch recommendations for half rack
| Posted: 28 Apr 2020 05:04 PM PDT It's Wednesday! Time to get that crap that's been bugging you off your chest! In the interests of spicing things up a bit around here, we're going to try out a Rant Wednesday thread for you all to vent your frustrations. Feel free to vent about vendors, co-workers, price of scotch or anything else network related. There is no guiding question to help stir up some rage-feels, feel free to fire at will, ranting about anything and everything that's been pissing you off or getting on your nerves! Note: This post is created at 00:00 UTC. It may not be Wednesday where you are in the world, no need to comment on it. [link] [comments]  |
| Posted: 28 Apr 2020 08:21 AM PDT Hi, i'm pretty new to python and I've just written a script then to emulate writing multiple VLANS to different Cisco switches. I'm a Network Engineer but i'm getting more and more into Python now as well because they're starting to become more closely related.I'm just wondering if anyone has any similar experience and could give my script a once over and let me know if they think there are any major issues with it or that it looks okay and will do the job.I'm pretty new to Python so go easy on me haha .Don't worry to much about the Cisco syntax next to read_until(), i'm more wondering if the actual logic of the script looks okay. Thanks everyone Update....i also did that script to because i wasn't sure if the open() function was necessary or not. [link] [comments]  |
| Are there third-party alternatives to the Cisco SSD for Catalyst 9300s yet? Posted: 28 Apr 2020 11:54 AM PDT So, according to Cisco's document about installing SSDs into the Catalyst 9300: "You must use only Cisco USB drives; non-Cisco USB drives are not supported." Has anyone figured out how to, you know, ignore that, and use a disk that isn't the SSD-120G from Cisco, list price 1500 damn dollars? Like "service unsupported-transceiver" but for SSDs? [link] [comments]  |
| Posted: 28 Apr 2020 10:06 AM PDT Dear Reddit r/networking community, first post, hooray! If I break any rules or am not conforming to the netiquette of this community please accept my apologies. TL;DR Do you know a (24/16/8 port) switch with 802.3bt power envelope for each individual port? This is question comes after a brainstorming session regarding setting up bold remote (rural) computer classrooms. Because Rural schools have limited access to IT technology and electrical energy. To tackle the challenge of IT technology a modular low power computer system with custom OS was created by volunteers. Some information regarding our project can be found by googling" educaid KUBO toolkit". Since setting up these systems in our 2 pilots we have noticed the frustration of the second limitation being affordable and reliable access to energy. The idea now is to use a PoE switch that can deliver next to data also energy to the low power computer systems. How this switch is going to be powered is another question with another technical background not to be discussed here. Because the combination of a monitor and the low power computer system consumes an easy 30Watt the 802.3af and 802.3at standards do not make the cut. 802.3bt with its 51W to 60W power envelope will suffice for our project needs (computer systems, monitor, lights, fans,…) Upon researching the necessary primary building block, being a 802.3bt switch the plethora of vendors and models were reviewed. And here it is where we could use your expertise. From research there are no 24/16/8 port switches that provide the 51-60W power envelope to each port. Some examples: Vendor A has a 24 port switch with only 8 ports 802.3bt enabled and the rest is 802.3af. Vendor B has a 16 port switch which are all 802.3bt but has a total capacity of 300Watt (300 / 16 = 19 Watt per port, not enough) Because there are so many models and so many vendors, I am wondering if the community knows of a model or a vendor that has a 24/16/8 (we aren't fussy) port switch which has 802.3bt (50Watt) available power for each port? Thank you very much [link] [comments]  |
| Traffic Generator with tunnelling support Posted: 28 Apr 2020 07:37 AM PDT Hi all, I'm trying to benchmark a gtp-u middlebox software, which encapsulate and decapsulate the IP traffic into GTP-U packets. I need a Traffic Generator that could work easily with encapsulated traffic. I tried TRex with the field engine but I'm not able to receive the traffic, Moongen for some reasons doesn't work for me and pkt-gen seems over kill for this situation. Do anyone have any suggestion on which software I can use? P.S. the target speed is 10Gbps and the cards support DPDK [link] [comments]  |
| Posted: 28 Apr 2020 12:24 PM PDT Getting brand new 3615 appliance upgrading from Cisco ise 2.3. Which do you recommend 2.6 or 2.7? Should I transfer my 2.3 operating system and configuration to the new appliance and then upgrade? Or, start fresh with a new image? [link] [comments]  |
| Posted: 28 Apr 2020 10:55 AM PDT I have two different fiber connections delivering Spectrum internet to my facility. Each fiber runs into a fiber switch and comes out ethernet to my edge firewall. My edge firewalls are PAs running in an Active-Passive HA configuration, so I would love to have an aggregate link from their fiber switches with one link from each switch to the PA. That way there is redundancy. Currently, if my firewalls fail over, those uplinks will go down since they are no longer connected to the active firewall. They said they can't do that. I don't have much experience in what ISPs can and can't do, so is it unreasonable of me to think they should be able to? [link] [comments]  |
| Retiring a Cisco 6504e. Replacing with a C9500-48Y4C Posted: 28 Apr 2020 01:12 AM PDT Due to the costs involved in getting a new supervisor card for our Cisco 6504E so it can support 40Gb interfaces and the fact it's pretty much EOL, we are looking at replacing our Cisco 6504E's. At the moment they are just core routers (BGP Free core). So they are simply running OSPF, handling LDP (MPLS-L3) and that's it. They are just pushing packets/labels. As such the replacements will be doing the same thing. As long as they can handle MPLS/LDP, OSPF then it should be fine. I've been looking at the C9500-48Y4C as these have 4 x 40Gb/100Gb ports as well as the oppurtunity to add an expansion at a later date if needed. I've used the Cisco compare/product feature and it seems to have everything we need. What's throwing me however is the cost. It's much cheaper than even the Supervisor card would have probably been for the 6504E. I know Cisco are pushing this product line and it's probably not marketed towards what we are going to be using them for but they do tick the boxes we need. Has anyone used these switches? Any issues or bugs I should be aware of, or any reason I'm crazy for looking at doing this? thanks [link] [comments]  |
| Rack Depth Issues - Any Workarounds? Posted: 28 Apr 2020 08:05 AM PDT Long story short, new Nexus 9500 chassis turns out to be 10" longer/deeper than the chassis it replaces. Chalking this up to a learning opportunity, I had arranged work to address power needs, logical design and physical cabling, etc. but never considered how much bigger the equipment could be. Realizing that putting in new racks is not an ideal option, I'm trying to figure out how to make this work best. The chassis are each 400 lbs, and hang out nearly 18". These are going on the very bottom of two separate racks (the patch panel rack is in between). I'm looking at rack extenders and shelving solutions, but this is fairly uncharted territory for me. How can I make this look professional and safe? If I can't, I'll end up with a new rack at the end of the aisle and back-haul the cabling mess as best as possible. I can't replace the existing racks (parallel deployment). Boss knows, no one is upset. It's not a consulting gig, just internal. Just trying to make the best of the situation. After you're done learning or laughing, I'd appreciate any suggestions [link] [comments]  |
| I may have found the two generals problem solution ? Posted: 28 Apr 2020 06:26 PM PDT I assume you are familiar with the two general's problem. I came here after watching Tom Scott's video about it. Feel free to correct me if I'm wrong. Both generals are aware of the strategy they will be using, because in a real world scenario where the generals are the client and the server, the developer creates both. So, as far as I know, the two general's problem is all about sending acknowledgements to acknowledgements without knowing when to stop, because the one general may not receive the last acknowledgement and won't send his army, because he doesn't know if the other general received the previous one. so instead of stopping, the generals can say that if they manage to maintain an acknowledgement sending rate of approximately one acknowledgement per second for the hour that is one hour before the attack time. I say approximately because if the last acknowledgement is not recieved and the rate is 1 acknowledgement 1.000277778, the generals should still attack. How approximately ? approximately enough for the last acknowledgement to be allowed not to happen, but not enough for the last two to be allowed not to happen. So about a 1 / 3600 seconds tolerance. What do you all think ? Do you see some case where this solution could fail ? (Not that it should be implemented in a real life scenario) edit : I tried to reply to a comment, but reddit told me to try again, so I did, but then two comments appeared at once. its the case where the client sends a message to the server, but doesnt recieve the acknowledgement of the server. How funny is that ! [link] [comments]  |
| Check Point SSL VPN Extender (Java) Posted: 28 Apr 2020 04:04 PM PDT Hi r/networking Disclaimer: I am not familiar with Checkpoint. My company is trying to provide web access to external users via the Checkpoint SSL VPN "SSL NETWORK EXTENDER". The problem: I get Java issues (on pic below), tried on three different laptops, windows 7, 10. and always get the same. Even with Java installed. With the current appliance, can we upgrade to a newer software that doesn't require this? Appliance: Check Point 730 Version (Firmware):R77.20.80 (990172392) https://github.com/alexma2344/sitio/tree/master/assets/images/checkpoint.png Note: This is to train users from other companies so we wouldn't want them to use the full client version like anyconnect. [link] [comments]  |
| [D] PTP Protocol + 10 Gigabit Switch? Posted: 28 Apr 2020 02:41 PM PDT I have a robot whom i need to read out from 5 machine vision cameras, dumping raw HD video frames at 45 FPS. These cameras can be powered by Power over Ethernet, but i also need my receiving PC to have the bandwidth needed to receive data from all of these. I also need to sync these cameras with the IEEE PTP Protocol I could either:
I dont know if the PTP protocol works with either 1 or 2. Or which is the right way to do things [link] [comments]  |
| Cloud hosted Webex latency at Ashburn DC, Zayo upstream- anyone else affected? Posted: 28 Apr 2020 02:19 PM PDT Cisco is claiming we are the only customer affected by this. Been working since Friday as they slogged BS at us before reaching highest level of escalation. Equinix DC in Ashburn has a couple hops that seem to be problematic, and only betweenhouts of 9-5 does latency rise for us from 17ms to 110-140ms, plus 9% ploss, making video unusable. Is anyone else having issues? The upstream is Zayo, and our ISP is Consolidated. No other ISP seems to have this issue in the area, so I assume it is just Zayo affected for this specific problem. Would love to hear another example of Cisco lying through their teeth about scope of issue. It took days with Zayo on the phone just to get them to stop claiming it was an issue on our side. [link] [comments]  |
| rndis usb to ethernet interface? Posted: 28 Apr 2020 03:14 PM PDT Does such a device exist so that I can take a rndis usb (ethernet over USB) and have it converted to ethernet? I can do it today using a simple raspberry pi and bridging the two interfaces (eth0 + usb0) together. I'm looking for something a bit easier to deploy and maintain. [link] [comments]  |
| Looking to find OID's for Aruba 2930M switch Posted: 28 Apr 2020 07:35 AM PDT I have been looking on the product page on HPE's site and cant seem to find what Im looking for. Any direction on how to either find them on HPE's site or some other method? [link] [comments]  |
| Posted: 28 Apr 2020 09:50 AM PDT Hello y'all, We are currently looking for a successor to our CISCO stack of 2 full SFP × WS-C3750X-24S-S + C3KX-NM-10G.Our network implements 95+ VLANs, dispatched to 50 or so 2950S and 2950X. The average daily traffic is around 13 TB (terabytes) or 104 Tb (terabit) (90% being IP CCTV). We'd like to replace this stack by recent and supported hardware that could withstand the current throughput + 50% min. while being as reliable as possible. This equipment centralizes our MAN and interconnects our buildings up to 3 Miles / 5 Km of distance (read SPOF). I plan to ask an integrator to assist us in the transition process but first things first, I'd like to know what you think. So, which family of Cisco hardware would you recommend for a 1-to-1 replacement? Since we are not using any advanced features on the switches or software to manage them, we are wondering whether we should look after some Mikrotik switches for this usage. Would you consider this brand or is this a no-go for a core equipment? Your guidance and advice will be much appreciated by my team and myself. Cheers. Edit: [link] [comments]  |
| Posted: 28 Apr 2020 12:50 AM PDT hello guys, [link] [comments]  |
| Posted: 28 Apr 2020 07:49 AM PDT Hello, I've been told that ISR4331 can do 1Gbps NAT Throughput, but with throughput license maximum I get is 300Mbps:
Is this the limit of this device? Or am I getting something wrong? Do I need any other license? [link] [comments]  |
| Checkpoint failed policy instalation - need to find log data Posted: 28 Apr 2020 07:35 AM PDT Hi there, I'm new to Checkpoint R80.30. Just had a policy installation fail and can't find the reason why it failed. We moved up from R77.30 and the the log part that included admin activity also had logs about policy installations and errors if any occured. Now the audit log only shows admin activity. can anyone point me in the direction where I can find log data bout policy installations? [link] [comments]  |
| Top of Rack SFP+ 10Gbe switch recommendations for half rack Posted: 27 Apr 2020 07:44 PM PDT I'm not a network engineer or even sysadmin, so please bear with me. We're looking to add 10Gbe capability to our half rack and I was hoping for some recommendations for a pair of Top of Rack switches. We have a half rack at a colocation facility, with 4 hypervisors, 1 NAS with 4 x 1Gbe RJ45, a new NAS with 6 x SFP+ 10Gbe ports, and a pfsense XG-7100 appliance with 2 SFP+ 10Gbe ports. Each hypervisor has 4 x 1Gbe ports, and we intend to buy SFP+ 10Gbe PCIe cards for the hypervisors, at least 2 ports per hypervisor. Our current switches are 48 port RJ45 1Gbe Cisco 2960-S switches stacked. The model we have has 4 x SFP 1Gbe uplink ports, so we don't have any SFP+ 10Gbe switch ports. We don't need fancy features but L3 capability is a must (we'd like to be able to give the switch an IP on each VLAN) and we'd like to have 2 switches for redundancy. The assumption is all recommendations have some link aggregation, DHCP relay / proxy. Our intent is to continue using the Cisco switches for a little while as we won't be able to get into the colo to rewire everything. So what we want are switches with plenty of SFP+ 10G and 1Gbe ports. I'm also curious as I read that some switches support both 10G/25G. Are such SFP ports compatible with adapters that only support SFP+ 10Gbe? Budget wise, we'd like to get the best bang for buck possible but need reliable workhorses that will last many many years - I'd say $2-5k max per switch is within our budget. Any help is greatly appreciated! [link] [comments]  |
| You are subscribed to email updates from Enterprise Networking news, blogs and discussion.. To stop receiving these emails, you may unsubscribe now. | Email delivery powered by Google |
| Google, 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States | |
No comments:
Post a Comment