LTE modem where I can control the MTU
Saku Ytti
saku at ytti.fi
Sat May 2 06:36:35 UTC 2020
On Fri, 1 May 2020 at 19:00, Dovid Bender <dovid at telecurve.com> wrote:
> I currently have an airlink that is connected directly to a raritan console server. The public IP sits on the raritan. The airlink does not seem to have any MTU options. Ideally I would change the MTU on the interface of the LTE modem wich would force the raritan to send all data < 1400 bytes per packet. I never thought about the reverse so we may need something that would tinker with the MSS as well.
Exactly my use-case with ISR4331 + async NIM + 4G NIM (1RU, single
integrated power supply). Call home over 4G with unspecified WAN IP
with IPSEC.
interface Tunnel1
description OM: OOB IPsec DMVPN - local wire out-of-band
ip address 100.100.1.18 255.255.255.0
no ip redirects
no ip proxy-arp
ip nhrp map 100.100.1.1 x.y.163.1
ip nhrp map 100.100.1.2 x.y.164.1
ip nhrp network-id 1
ip nhrp holdtime 300
ip nhrp nhs 100.100.1.1
ip nhrp nhs 100.100.1.2
ip route-cache same-interface
ip tcp adjust-mss 1350
load-interval 30
keepalive 10 3
tunnel source Cellular0/2/0
tunnel mode gre multipoint
tunnel key 1
tunnel protection ipsec profile OOB
hold-queue 3584 in
!
!interface Cellular0/2/0
description OM: WAN out-of-band - SINGTEL SIM X
ip address negotiated
no ip redirects
no ip proxy-arp
ip access-group FROM:INTERNET in
load-interval 30
dialer in-band
dialer idle-timeout 0
dialer watch-group 1
no ipv6 nd ra suppress
hold-queue 3584 in
!
controller Cellular 0/2/0
lte modem link-recovery rssi onset-threshold -110
lte modem link-recovery monitor-timer 20
lte modem link-recovery wait-timer 10
lte modem link-recovery debounce-count 6
--
++ytti
More information about the NANOG
mailing list