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- About CMTech1
CMTech1
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Member since Dec 6, 2017
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10-19-2021
12:50 PM
@Agio-Networks; As of today we're still seeing the random drops. We see the issue to the three locations we have, US East 2, US West and UK South so if I had to point a finger, though really don't want to, I'd say it's a Meraki issue. Anyway, we have an open/ongoing case with Meraki and the most recent change they made (we don't have access to do) was change the default MTU from 1500 to 1420 to allow more room for the Auto VPN header is what they stated. However, at this time after another week of monitoring it seems we are still dropping random packets so that didn't resolve the issue and have to reply back with the bad news. If I ever do get a resolve, I'll be sure to post it here. Just surprised others haven't seen this in their network monitors.
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07-21-2021
06:52 PM
I know this an an old thread, but looking around this is exactly my issue and its July 2021 and still don't see any definitive answers. I'd hate to have to tear down this vMX and set back up, but before I do, just seeing if anyone here in 2021 had and/or having this issue and if any resolve? I have two vMX's (Mediums) for two different regions running about five to ten VM's in Azure connecting as hubs since requirement to have multi-site connectivity for RD's and such. Anyway, on vMX in UK works fine and no issues, the other one here in US on east coast has same issue with dropped packets as described here. I know it's the vMX, if I PSPing to multiple IP's both Public and Private I lose the packets at the vMX IP and all servers behind that which show same time packet lose as I worked my way back out from the vnet subnets yet no drops on the MS Public IP.
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05-26-2021
12:38 PM
Hi All, I found the cause, but not the root cause/reason and have to contact our A/V-Malware security vendor. Even though this laptop has the same security policy as others something was causing this particular laptop, and likely the other two we had, block all internet traffic. A thorough review of this particular laptop event logs and the security system (A/V-Malware) log files didn't show anything wrong on this device, nor do we have any definitive answers at this time. We have hundreds of other systems using the same exact security policy, same Win10 version and same updates applied so very strange. Hopefully the vendor can shed some light on this, but for now thanks to everyone that responded!
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05-24-2021
04:53 AM
@ww I guess I could try a third MAC, however WiFi and LAN experience the same issue though can try possibly a USB Wireless or MAC spoofing as you mention.
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05-24-2021
04:51 AM
@PhilipDAth, Yes, the laptop can be plugged into the LAN and/or WiFi and still doesn't work No policies are set against this device as validated during diag session with Meraki. Get's DHCP from local DC. No reservations and/or MAC deny filters shown. Yes, DNS works fine. Can even ping google.com, msn.com or whatever though when you launch the browsers either Chrome, IE or Edge they just don't load webpages.
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05-21-2021
12:19 PM
Hi Think Tank! So the short of the long is this and we're a bit befuddled here. We have a full stack network so MX100 and a few MS225's so you know, but this isn't just this one site as now another site had same issue with laptop not connecting. Anyway, we had three laptops over the past four months that all the sudden are unable to access the internet. All three laptops are different models though all HP's (ProBook & EliteBook) with Win10 two with 1909 and one was 1803. We ran multiple malware and proxy scans from our Anti-Virus and Malware solution provider as well as other vendors with no issues. No same MS Updates are on all three, however we did roll back two updates that were within the week prior to the issue happening on two of them with no luck. We reviewed everything we could within Meraki dashboard and finally called Meraki support. Funny thing is they were puzzled too after working with one laptop for a couple hours trying to figure out the issue while reviewing packet and live connection. If I take the laptop and connect to our backup network or used remotely outside the offices they work fine so we know it's not the laptops. I would think something blocking the MAC, but Meraki Support had no clue even when we moved the one laptop to our DevOps network and it worked fine. Again, nothing was changed as far as Meraki settings at either of these locations where it occurred and with Meraki not sure........well here I am asking the think tank!
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01-07-2021
12:44 PM
3 Kudos
Lets not discuss last year, but start off the New Year with something positive. Currently implementing my first vMX in Azure as a test pilot in preparation for a on-premise virtual environment migration to Azure project while maintaining a Meraki mesh network sometime mid-2021! 🙂
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08-13-2019
12:48 PM
1 Kudo
Streamline tasks and operations for improved efficiencies without losing focus on privacy and security.
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07-30-2019
05:02 PM
1 Kudo
Seems to have been CDN issues as noted. ISP found root cause and have escalated for repair to international vendor edge/border Route. Thanks!
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07-30-2019
05:00 PM
Solarwinds and various other manual tests via the firewall native tools.
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07-30-2019
10:51 AM
That could very well be an ISP issue as you mentioned and where I'm going next with this if Meraki support unable to help further. I did have a similar issue with ISP where CDN was blocking port 500/4500 though entire VPN was down unlike this situation where it sorta works I guess 🙂
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07-30-2019
05:58 AM
Correct, everything is green, s2s vpn connected correctly and can pass traffic between the two sites, just keep freezing up when multiple packets dropped. Firewall VPN rules are Open/Open and Enabled as they have always been. Allowed VPN VLAN's are still the same ones permitted to pass and technically are passing, just dropping major packets.
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07-30-2019
05:56 AM
WAN from either side is solid as well as to any other WAN site. This is isolated issue to just the S2S VPN. Firewall rules on VPN is open and enabled in both directions. Just all the sudden started dropping packets when we came in on Monday and nothing nor any changes were done over weekend.
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07-30-2019
05:29 AM
I have a strange issue I'm unable to locate and spent a couple hours with Meraki support only to ask we reboot the MX's, which we did with no resolution. Even changed S2S VPN from Hub to Spoke to Off and then back on with no resolve and finding it hard to track down actual root cause. Have (8) sites all with Meraki MX's and all are Hub to create a mesh network. Has been working this way for months without issue, however yesterday between two of the sites we have a 20-40% packet loss. It is only between these two sites that have been working perfectly since January and one site has MX100 while other has MX84 not that it should matter since same under the hood. What's interesting is both these sites can ping anything anywhere, WAN, LAN or any other S2S MX's without an issue. However, these two sites in question have issues pinging each other and we're having difficulty operating due to the issues since these two particular sites share many resources. The issue is present in both directions. Anyone experience similar?
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11-01-2018
08:33 AM
Hi PhilipDAth. Thanks for the info, but not a network speed issue and seems to be a session layer issue. I just found the solution to be related to the site-to-site default setting needing to be set to corp office though not 100% sure why, however it works now.
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11-01-2018
08:30 AM
Hi BlakeRichardson..........Thanks for the info though the change didn't help so rolled it back. However, after further testing today I found the issue though scratching my head. Since the site is considered a spoke and I'm the hub I set the corp office VPN as the default within the Site-to-Site and this system started to work again. Not sure why, but not looking the gift horse in the mouth 🙂
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10-31-2018
12:37 PM
Hi, I have an issue I'm at a loss with and looking for any possible guidance. Our Corp Office has a MX and remote site had SonicWALL (SW). We then upgraded the SonicWALL with a Meraki and we have one issue we just can't figure out. After we replaced the SW with an MX at remote site we lost connection with our Motorola handheld devices to the App Server used for MFG scanning. The handhelds are Motorola MC9100 series and can connect to the WiFi network, able to access local network resources as well as internet. However, when we run the inventory app it just freeze and never launches. If we connect the handheld through a PC via a cradle it works fine and able to connect to the server app back to Corp Off. We tested connection via a laptop on same wireless and could telnet to Corp Off without issue as handshake worked using same protocol (Telnet) so we know it's not the actual port being blocked (10.10.10.10:4000). VPN tunnel firewall rule is Any/Any, disabled AMP and IPS on both sides and still not passing with handheld on wireless. Any ideas? Thanks, Mark
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02-07-2018
10:48 AM
I was looking for both and already found what I needed, but that’s for asking.
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12-29-2017
06:13 AM
Thanks, I feel kinda stupid now as I keep forgetting about those tabs. Thanks for the quick reply and guidance though 🙂
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12-29-2017
05:29 AM
1 Kudo
Hi, I'm looking for a quick way to show the mac address table. I have the MS225's MS250' and I'd like to do what I use to on my old Cisco Switch hardware when using "sh mac-add" which shows the entire table with MAC, Port and VLAN. I can see the MAC in Meraki Switch under ports one by one, but can't figure out how to just obtain the entire list in one shot like I do with other Cisco Switches. Thanks, Mark
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