Jeremy, Please give me a call today @ 859-308-3913. There is no reason to change the MTU on the EPC nor should anyone do it
Thanks, Nick -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: November 1, 2016 10:12 PM To: [email protected] Subject: Telrad Digest, Vol 25, Issue 1 Send Telrad mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit http://lists.wispa.org/mailman/listinfo/telrad or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of Telrad digest..." Today's Topics: 1. Re: L3 MTU settings (Jeremy Austin) 2. Re: L3 MTU settings (Nathan Anderson) ---------------------------------------------------------------------- Message: 1 Date: Tue, 1 Nov 2016 13:50:34 -0800 From: Jeremy Austin <[email protected]> Subject: Re: [Telrad] L3 MTU settings To: [email protected] Message-ID: <cabnb40ukjj3qfzny1jpt21fuvwlyyz7ngutmjks_tvwyn3j...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" On Sun, Oct 16, 2016 at 12:26 AM, J Portman <[email protected]> wrote: > Yup, but the EPC vlans are hard set to 1500 at the current time and no > way to change them. Beating my head against this wall right now. > Using the resources in this thread, I've tracked down a couple points of interest. ENBs running [4013, 4539, or 4573] return a full packet (ICMP+headers) of MTU 1900. (Payload 1900-28=1872) This is on either bearer or management VLANs. EPC running 729, however, returns only 1496 (1468+headers). This is on several PDNs, management, and bearer. In all cases (Mikrotik routers, Netonix switches in some places) MTU size is set to 1900 or higher. On the EPC, netstat does not appear to show interface info (no -i flag), so I can't tell what the MTU is purported to be. Has anyone had success verifying and/or changing the EPC's MTU(s)? -- Jeremy Austin (907) 895-2311 (907) 803-5422 [email protected] Heritage NetWorks Whitestone Power & Communications Vertical Broadband, LLC Schedule a meeting: http://doodle.com/jermudgeon -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.wispa.org/mailman/private/telrad/attachments/20161101/2855261f/attachment-0001.html ------------------------------ Message: 2 Date: Tue, 1 Nov 2016 18:11:29 -0700 From: Nathan Anderson <[email protected]> Subject: Re: [Telrad] L3 MTU settings To: "[email protected]" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset="utf-8" Don't ask me how I got this; ifconfig results from EPC running 729: eth1 Link encap:Ethernet HWaddr XX:XX:XX:XX:XX:XX inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:X errors:0 dropped:0 overruns:0 frame:0 TX packets:X errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:X (x.x GiB) TX bytes:X (x.x GiB) Interrupt:77 Base address:0xc000 eth1.11 Link encap:Ethernet HWaddr XX:XX:XX:XX:XX:XX inet addr:x.x.x.x Bcast:x.x.x.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1496 Metric:1 RX packets:X errors:0 dropped:0 overruns:0 frame:0 TX packets:X errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:X (x.x GiB) TX bytes:X (x.x GiB) eth1.12 Link encap:Ethernet HWaddr XX:XX:XX:XX:XX:XX inet addr:x.x.y.x Bcast:x.x.y.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1496 Metric:1 RX packets:X errors:0 dropped:0 overruns:0 frame:0 TX packets:X errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:X (x.x GiB) TX bytes:X (x.x GiB) eth1.13 Link encap:Ethernet HWaddr XX:XX:XX:XX:XX:XX inet addr:a.b.c.d Bcast:a.b.c.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1496 Metric:1 RX packets:X errors:0 dropped:0 overruns:0 frame:0 TX packets:X errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:X (x.x GiB) TX bytes:X (x.x GiB) VLAN 11 is bearer, VLAN 12 is management, VLAN 13 is PDN. I could try increasing the MTU manually on the master interface and then on the VLANs, outside of confd, but that would not persist across reboots of the EPC. It would be an interesting experiment, however, just to see if the hardware (or at least the current software/drivers) is capable of it. We currently aren't pursuing full 1500 MTUs for LTE end-users (hasn't been a problem to-date), so I haven't dug very far into this. I have just been reading the threads here with interest and curiosity. However, given what I'm seeing on ours, I don't see how, despite what we have seen posted here earlier, it is at all currently possible to achieve 1500 MTU to end-user. Not simply because the PDN VLAN is restricted to 1496 (which would make that the highest MTU from end-user to internet possible), but also because the bearer VLAN is stuck at 1496, which is a whopping 78 bytes short of the purported minimum 1574 MTU that is needed. So: does anybody actually have this working? If not, why have we been told that it is possible with the current software releases? -- Nathan From: [email protected] [mailto:[email protected]] On Behalf Of Jeremy Austin Sent: Tuesday, November 01, 2016 2:51 PM To: [email protected] Subject: Re: [Telrad] L3 MTU settings On Sun, Oct 16, 2016 at 12:26 AM, J Portman <[email protected]<mailto:[email protected]>> wrote: Yup, but the EPC vlans are hard set to 1500 at the current time and no way to change them. Beating my head against this wall right now. Using the resources in this thread, I've tracked down a couple points of interest. ENBs running [4013, 4539, or 4573] return a full packet (ICMP+headers) of MTU 1900. (Payload 1900-28=1872) This is on either bearer or management VLANs. EPC running 729, however, returns only 1496 (1468+headers). This is on several PDNs, management, and bearer. In all cases (Mikrotik routers, Netonix switches in some places) MTU size is set to 1900 or higher. On the EPC, netstat does not appear to show interface info (no -i flag), so I can't tell what the MTU is purported to be. Has anyone had success verifying and/or changing the EPC's MTU(s)? -- Jeremy Austin (907) 895-2311<tel:%28907%29%20895-2311> (907) 803-5422<tel:%28907%29%20803-5422> [email protected]<mailto:[email protected]> Heritage NetWorks Whitestone Power & Communications Vertical Broadband, LLC Schedule a meeting: http://doodle.com/jermudgeon -------------- next part -------------- An HTML attachment was scrubbed... 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