Interesting presentations/talks from the networking industry Networking |
- Interesting presentations/talks from the networking industry
- How do you survive in networking if you are a colour blind?
- Shortel (Mitel) VOIP and Cisco QOS
- Edit&Commit Crontab Nokia
- ACI L3Out Routes Leaked Into All Tenants
- WinSCP like app for Android
- Help with ISE 2.4 and Guest SSL for Redirect page
- Hands on networking book?
- What is MEU?
- Anybody using aci with VMWare integration
- Router with 2 LTE's and multiplying packets over both interfaces
- Bizzare Network Issue
- How does WIFI client devices switch between 2.4Ghz and 5Ghz
| Interesting presentations/talks from the networking industry Posted: 28 Sep 2019 02:43 AM PDT Recently, I stumbled upon a couple of presentation from netflix where the engineers explain Netflix architecture and the kind of interesting stuff they are doing at Netflix. What are your favorite talks from some of the best engineers in the networking world? Please share. If anyone is interested in the Netflix video, This is the link [link] [comments]  |
| How do you survive in networking if you are a colour blind? Posted: 28 Sep 2019 02:11 PM PDT |
| Shortel (Mitel) VOIP and Cisco QOS Posted: 28 Sep 2019 04:16 AM PDT We are working on setting up our QOS on the following catalyst switches (Catalyst 3750x) (Layer 3 Site 1) Catalyst (9410) (Layer 3 Site 2) Catalyst 2960s/x (Layer 2 Edge) According the the mitel document https://bit.ly/2ntFiOi we can use auto qos and the phones use LLDP Do we need to configure access lists and policy maps/service policy's on the 3750x and 9410? Or will auto qos be sufficient? The commands suggested by mitel are below, any help is appreciated 2960s/x Mls qos Auto qos or Auto qos srnd4 Srr-queue bandwidth share 10 10 60 20 Priority-queue out Mls qos trust dscp Auto qos voip trust Switchport mode access Switchport access vlan 10 Switchport voice vlan 20 No cdp enable Spanning tree portfast 3750x/9410 QOS Auto qos voip trust or auto qos trust (first interface) <What does first interface mean?> Auto qos voip trust or auto qos trust (first interface) <what does "first interface mean?> Service-policy input AutoQos-4.0-input policy Service-policy output autoqos-4.0-Output Policy Switchport mode access Switchport access vlan 10 Switchport access vlan 20 No cdp enable Spanning tree-portfast Ip access-list extended acl-qos-shoretel-RTP Remark shoretel-voip-media Permit udp any any range 10000 14500 Ip access-list extended acl-qos-shoretel-voip Remark shoretel-voip-call-and-system-control Permit udp any any eq 2427 Permit udp any any eq 2727 Permit udp any any eq 5060 Permit udp any any range 5440 5443 Permit udp any any range 5445 5446 Permit udp any any eq 5450 Permit tcp any any range 5060 5061 Permit tcp any any eq 5430 Permit tcp any any range 5447 5448 Permit tcp any any eq 5452 Permit tcp any any eq 31453 Permit udp any any eq 31453 Class-map match-any class-shoretel-media-input Match access-group name acl-qos-shoretel-RTP Match dscp ef Class-map match-any class-shoretel signaling-input Match access-group name acl-qos-shoretel-voip Match ip dscp cs3 Class-map match-any class-shoretel-media output Match access-group name acl-qos-shoretel-voip Match ip dscp ef Class-map match-any class-shoretel-signaling-output Match access-group name acl-qos-shoretel-voip Match ip dscp cs3 Policy-map shoretel-output-policy Class class-shoretel-media-output Set dscp ef Priority Class class-shoretel-signaling-output Set dscp cs3 Bandwidth remaining percent 15 Class-class-default Set dscp default Bandwidth remaining percent 60 Policy-map shoretel-input-policy Class class-shoretel-media-input Set dscp ef Class class-shoretel-signaling-input Set dscp cs3 Class class-default Set dscp default Service-policy input shoretel-input policy Service-policy output shoretel-output-policy Interface ten gigabit ethernet 1/0/1 Description trunk port Switchport mode trunk Qos trust dscp Auto qos trust Service-policy input-shortel-input-policy Service-policy output shortel-output -policy [link] [comments]  |
| Posted: 28 Sep 2019 11:09 AM PDT Hi Team, Could anybody help me to edit & commit changing on old Nokia ip400 (ipso/clish) Without breaking anything or losing the stability of the equipment in production. I need to remove some jobs.(Tuesday midnight in special) If anybody needs more information, please advise me. TIA Software Release: 3.2.1-fcs1 Software Version: releng 849 11.24.1999-102644 DO NOT EDIT THIS FILE - edit the master and reinstall.(/tmp/crontab.2674 installed on Thu Sep 1 10:48:03 2005)(Cron version -- $Id: crontab.c,v 1.2 1997/11/11 00:25:18 kevin Exp $)38 1 * * 3 tar -c -f /var/admin/CONF.tar /opt/pkg/FireWall-1-des.v4.0.SP-5.ipso3.2.1/conf 38 1 * * 3 tar -c -f /var/admin/DATABASE.tar /opt/pkg/FireWall-1-des.v4.0.SP-5.ipso3.2.1/database 39 1 * * 3 cp /config/db/initial /var/admin/INITIAL.txt 41 1 * * 3 ftp -p -i 2.2.2.2 0 0 * * 3 /opt/pkg/FireWall-1-des.v4.0.SP-5.ipso3.2.1/bin/fw logswitch 10 1 * * * /var/admin/collector 12 1 * * * /var/admin/monitor.sh [link] [comments]  |
| ACI L3Out Routes Leaked Into All Tenants Posted: 28 Sep 2019 07:43 AM PDT I have a question about L3Outs... Pretty new to ACI. I understand basic MPLS L3VPNs decently. We are utilizing common tenant and default vrf for our 2x L3Outs. One L3Out is for default route and whatever networks live on the perimeter. The other L3Out is for the "rest of backbone" network. All tenants need access to both L3Outs. Today we are leaking all of our backbone routes into each tenant and are exceeding maximum number of routes and having issues programming routes into hardware. My question is if I leak only the default route to the tenants, the theory is that I will drain all traffic toward the common tenant, then the common tenant has more specific routes to tell traffic where to go. As long as the contracts allow the traffic, will this work as desired? As I understand it we would export the default route with a target then import that target into the tenants... And vice versa from tenant to common. The theory is any tenant to tenant (excluding common) will still be exported/imported on a per tenant basis as needed and will still route directly between each other without traversing the border leafs). [link] [comments]  |
| Posted: 28 Sep 2019 05:14 AM PDT Hi, i have few linux servers, i used them as storage box. These are old boxes which i access by ssh with winscp from windows pc but sometimes i need to transfer files directly from android to these boxes. Is there any android app which can do that ? Note: I can't install NAS software on them and i use SCP [link] [comments]  |
| Help with ISE 2.4 and Guest SSL for Redirect page Posted: 28 Sep 2019 08:40 AM PDT I have my Guest Portal redirct page working great with a GoDaddy public cert for every platform except Android. The more I looked into it it looks as though Android must have the Intermediate bundled into the cert. I concatenated them both into a cert in the Issued>Intermediate order and the file open up and looks fine. I replaced the cert in ISE and it still doesn't work. I exported the cert from a Wireshark capture and a Windows client and the intermediate looks to be stripped out. Not sure where I'm going wrong here. [link] [comments]  |
| Posted: 28 Sep 2019 01:50 PM PDT Hello I work for a rather large cooperation and often have to troubleshoot networking problems for customer systems. Although I got a degree in computer science, my networking background is rather weak in my opinion. Often, I have to ask for help from a senior sys engineer regarding any complicated network problem (typically involving VLANS/Tagging/Etc). Is there a book I can purchase that targets practical scenarios? I'd like to go buy a switch and tinker around some exercises. I've read a a network+ certification book but it doesn't really get too much into the hands on of networking. Thank you very much and I'm sorry if i posted this in the wrong subreddit. [link] [comments]  |
| Posted: 28 Sep 2019 09:44 AM PDT |
| Anybody using aci with VMWare integration Posted: 27 Sep 2019 11:16 PM PDT Anybody using aci with VMWare dvs integration? Any issues? Bonus question. Has anyone successfully migrated from network centric mode to application centric mode. How did you map the dependencies and how long did the migration process take? [link] [comments]  |
| Router with 2 LTE's and multiplying packets over both interfaces Posted: 28 Sep 2019 04:47 AM PDT Does anyone know a router where I could have two LTE connections active, and mutiply packets over each interfaces. I feel like this is the only way to guarantee some kind of connectivity in a moving vehicle where the signal strengths etc might change all the time. I've had situations where the mobile link is up, but you can only get the OSPF packets go through and pretty much nothing else as it's so slow. From the routers perspective it sees the link as up and doesn't switch to another link. And with routers that fail over to second link after a certain period, it might be already too late. If the vehicle is moving there might be a blind spot for the first ISP for 3 seconds and then it is fixed. So this is why I though multiplying packets over two interfaces could work. I would have a second router in the DC that receives the packets from both ISPs and replies to the first one and drops the second one if it ever comes to the router as it's a duplicate. As a non-profit situation this also would need to be budget friendly setup :) I'm also open to an idea of getting industrial grade mini-pc and fitting that with multiple LTE cards and then doing this all with software router/linux. Thanks for any ideas! [link] [comments]  |
| Posted: 27 Sep 2019 08:02 PM PDT I've been fighting a weird network gremlin for 3 weeks. About 2-3 times a day, various parts of the network become unreachable. It seems to vary each time it happens. I have noticed that discards-in on many core switch ports seem to increase during these blips. I've also noticed that every time it happens, I end up with a ton of BAD ADDRESS in DHCP. It seems to only happen during the week when users are onsite. I don't think it's rogue DHCP. I've enabled DHCP snooping on the edge and DHCP flood protection and MAC address checking on the core and it doesn't seem to have helped. Any ideas? [link] [comments]  |
| How does WIFI client devices switch between 2.4Ghz and 5Ghz Posted: 27 Sep 2019 09:04 PM PDT Not a wifi expert here and trying to understand how does the wifi client switch between 2.4 and 5Ghz ssid ... Say I have a wifi network with multiple standalone APs and all the APs are capable for both 2.4 and 5Ghz bands. Clients' wifi card/adapter supports both bands as well. I configured Corp-WIFI as the SSID name on both bands with WPA2 PSK. Would wifi client switch between the two bands automatically? If so, what is/are the factors for clients to make the switch? If not, why and how should design/setup the network to utilize both bands efficiently? Just use "intelligent" band steer function in the AP? [link] [comments]  |
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