Other connections such as http and ws work well, but the mobile interface (mob1s1a1) is restarted when starts webrtc connections via this router (RUT956, RUT9M_R_00.07.08). The cpu load is around 50% and the system log is as follows:
Thu Jul 25 09:43:32 2024 daemon.notice netifd: mob1s1a1 (1346): Mobile connection lost!
Thu Jul 25 09:43:32 2024 daemon.notice netifd: Interface 'mob1s1a1' has lost the connection
Thu Jul 25 09:43:32 2024 daemon.notice netifd: Network device 'wwan0' link is down
Thu Jul 25 09:43:32 2024 daemon.notice netifd: mob1s1a1 (2062): Stopping network mob1s1a1
Thu Jul 25 09:43:33 2024 daemon.notice netifd: mob1s1a1 (2062): Stopping network on /dev/cdc-wdm0!
Thu Jul 25 09:43:33 2024 user.notice netifd: uqmi -s -d /dev/cdc-wdm0 -t 3000 --set-client-id wds,17 --stop-network 0xFFFFFFFF --autoconnect
Thu Jul 25 09:43:33 2024 daemon.notice netifd: mob1s1a1 (2062): "No effect"
Thu Jul 25 09:43:33 2024 daemon.notice netifd: mob1s1a1 (2062): Releasing client-id 17 on /dev/cdc-wdm0
Thu Jul 25 09:43:33 2024 user.notice netifd: uqmi -s -d /dev/cdc-wdm0 -t 3000 --set-client-id wds,17 --release-client-id wds
Thu Jul 25 09:43:34 2024 daemon.notice netifd: mob1s1a1 (2062): Command failed: Not found
Thu Jul 25 09:43:34 2024 daemon.notice netifd: Network device 'qmimux0' link is down
Thu Jul 25 09:43:34 2024 daemon.notice netifd: Interface 'mob1s1a1_4' has link connectivity loss
Thu Jul 25 09:43:36 2024 daemon.notice netifd: Interface 'mob1s1a1_4' is disabled
Thu Jul 25 09:43:36 2024 daemon.notice netifd: mob1s1a1 (2062): Command failed: Permission denied
Thu Jul 25 09:43:36 2024 daemon.notice netifd: Interface 'mob1s1a1' is now down
Thu Jul 25 09:43:36 2024 daemon.warn dnsmasq[5592]: no servers found in /tmp/resolv.conf.d/resolv.conf.auto, will retry
Thu Jul 25 09:43:36 2024 daemon.notice netifd: Interface 'mob1s1a1' is setting up now
Thu Jul 25 09:43:36 2024 daemon.notice netifd: mob1s1a1_4 (1370): udhcpc: SIOCGIFINDEX: No such device
Thu Jul 25 09:43:36 2024 daemon.notice netifd: mob1s1a1_4 (1370): udhcpc: received SIGTERM
Thu Jul 25 09:43:36 2024 daemon.notice netifd: mob1s1a1_4 (1370): udhcpc: unicasting a release of 166.147.207.110 to 166.147.207.109
Thu Jul 25 09:43:36 2024 daemon.notice netifd: mob1s1a1_4 (1370): udhcpc: sending release
Thu Jul 25 09:43:36 2024 daemon.notice netifd: mob1s1a1_4 (1370): udhcpc: can't bind to interface qmimux0: No such device
Thu Jul 25 09:43:36 2024 daemon.notice netifd: mob1s1a1_4 (1370): udhcpc: bindtodevice: No such device
Thu Jul 25 09:43:36 2024 daemon.notice netifd: mob1s1a1_4 (1370): udhcpc: entering released state
Thu Jul 25 09:43:37 2024 daemon.notice netifd: mob1s1a1_4 (1370): Command failed: Permission denied
Thu Jul 25 09:43:37 2024 daemon.notice netifd: Interface 'mob1s1a1_4' is now down
Thu Jul 25 09:43:37 2024 daemon.notice netifd: mob1s1a1 (2304): wwan[2304] Using wwan usb device on bus 1-1.4
Thu Jul 25 09:43:37 2024 daemon.notice netifd: mob1s1a1 (2304): wwan[2304] Using proto:qmux device:/dev/cdc-wdm0 iface:wwan0 desc:Quectel EC25
Thu Jul 25 09:43:38 2024 daemon.info dnsmasq[5592]: read /etc/hosts - 12 names
Thu Jul 25 09:43:38 2024 daemon.info dnsmasq[5592]: read /tmp/hosts/dhcp.cfg01411c - 4 names
Thu Jul 25 09:43:38 2024 daemon.info dnsmasq-dhcp[5592]: read /etc/ethers - 0 addresses
Thu Jul 25 09:43:40 2024 kern.info Mobile data disconnected (internal modem)
Thu Jul 25 09:43:42 2024 daemon.info dnsmasq[5592]: read /etc/hosts - 12 names
Thu Jul 25 09:43:42 2024 daemon.info dnsmasq[5592]: read /tmp/hosts/dhcp.cfg01411c - 4 names
Thu Jul 25 09:43:42 2024 daemon.info dnsmasq-dhcp[5592]: read /etc/ethers - 0 addresses
Thu Jul 25 09:43:43 2024 daemon.notice netifd: mob1s1a1 (2304): Calculated qmimux ifname: qmimux0
Thu Jul 25 09:43:43 2024 user.notice netifd: uqmi -d /dev/cdc-wdm0 --timeout 10000 --set-autoconnect disabled
Thu Jul 25 09:43:44 2024 daemon.notice netifd: mob1s1a1 (2304): Informing driver of raw-ip for wwan0 ..
Thu Jul 25 09:43:44 2024 user.notice root: uqmi -d /dev/cdc-wdm0 --timeout 6000 --wda-set-data-format --link-layer-protocol raw-ip --ul-protocol qmap --dl-protocol qmap --dl-max-datagrams 16 --dl-datagram-max-size 4096 --ul-max-datagrams 11 --ul-datagram-max-size 4096 --dl-min-padding 0
Thu Jul 25 09:43:44 2024 user.notice netifd: uqmi -d /dev/cdc-wdm0 --timeout 6000 --set-client-id wds,17 --release-client-id wds --modify-profile 3gpp,3 --profile-name 3 --roaming-disallowed-flag no
Thu Jul 25 09:43:45 2024 user.notice netifd: uqmi -d /dev/cdc-wdm0 --timeout 6000 --get-client-id wds
Thu Jul 25 09:43:45 2024 daemon.notice netifd: mob1s1a1 (2304): 17
Thu Jul 25 09:43:45 2024 daemon.notice netifd: mob1s1a1 (2304): cid4: 17
Thu Jul 25 09:43:45 2024 user.notice netifd: uqmi -d /dev/cdc-wdm0 --timeout 6000 --wds-bind-mux-data-port --mux-id 1 --ep-iface-number 4 --set-client-id wds,17
Thu Jul 25 09:43:45 2024 user.notice netifd: uqmi -d /dev/cdc-wdm0 --timeout 6000 --set-ip-family ipv4 --set-client-id wds,17
Thu Jul 25 09:43:45 2024 user.notice netifd: uqmi -d /dev/cdc-wdm0 --timeout 6000 --set-client-id wds,17 --start-network --profile 3 --ip-family ipv4
Thu Jul 25 09:43:46 2024 daemon.notice netifd: mob1s1a1 (2304): pdh4: -2026437712
Thu Jul 25 09:43:46 2024 daemon.notice netifd: mob1s1a1 (2304): -2026437712
Thu Jul 25 09:43:46 2024 daemon.notice netifd: mob1s1a1 (2304): Setting up qmimux0
Thu Jul 25 09:43:46 2024 daemon.notice netifd: mob1s1a1 (2304): Setting dynamic MTU: 1428 on qmimux0
Thu Jul 25 09:43:46 2024 daemon.notice netifd: Interface 'mob1s1a1' is now up
Thu Jul 25 09:43:46 2024 daemon.notice netifd: Network device 'wwan0' link is up
Thu Jul 25 09:43:46 2024 daemon.notice netifd: mob1s1a1 (2304): Setting up qmimux0 V4 DCHP
Thu Jul 25 09:43:47 2024 daemon.notice netifd: Interface 'mob1s1a1_4' is enabled
Thu Jul 25 09:43:47 2024 daemon.notice netifd: Network device 'qmimux0' link is up
Thu Jul 25 09:43:47 2024 daemon.notice netifd: Interface 'mob1s1a1_4' has link connectivity
Thu Jul 25 09:43:47 2024 daemon.notice netifd: Interface 'mob1s1a1_4' is setting up now
Thu Jul 25 09:43:47 2024 daemon.notice netifd: mob1s1a1_4 (2938): udhcpc: started, v1.34.1
Thu Jul 25 09:43:47 2024 daemon.notice netifd: mob1s1a1_4 (2938): udhcpc: broadcasting discover
Thu Jul 25 09:43:47 2024 daemon.notice netifd: mob1s1a1_4 (2938): udhcpc: broadcasting select for 166.147.207.110, server 166.147.207.109
Thu Jul 25 09:43:47 2024 daemon.notice netifd: mob1s1a1_4 (2938): udhcpc: lease of 166.147.207.110 obtained from 166.147.207.109, lease time 7200
Thu Jul 25 09:43:48 2024 user.notice firewall: Reloading firewall due to ifup of mob1s1a1 (wwan0)
Thu Jul 25 09:43:48 2024 daemon.notice netifd: Interface 'mob1s1a1_4' is now up
Thu Jul 25 09:43:48 2024 daemon.info dnsmasq[5592]: reading /tmp/resolv.conf.d/resolv.conf.auto
Thu Jul 25 09:43:48 2024 daemon.info dnsmasq[5592]: using nameserver 198.224.173.135#53
Thu Jul 25 09:43:48 2024 daemon.info dnsmasq[5592]: using nameserver 198.224.174.135#53
Thu Jul 25 09:43:48 2024 daemon.info dnsmasq[5592]: using only locally-known addresses for test
Thu Jul 25 09:43:48 2024 daemon.info dnsmasq[5592]: using only locally-known addresses for onion
Thu Jul 25 09:43:48 2024 daemon.info dnsmasq[5592]: using only locally-known addresses for localhost
Thu Jul 25 09:43:48 2024 daemon.info dnsmasq[5592]: using only locally-known addresses for local
Thu Jul 25 09:43:48 2024 daemon.info dnsmasq[5592]: using only locally-known addresses for invalid
Thu Jul 25 09:43:48 2024 daemon.info dnsmasq[5592]: using only locally-known addresses for bind
Thu Jul 25 09:43:48 2024 daemon.info dnsmasq[5592]: using only locally-known addresses for lan
Thu Jul 25 09:43:52 2024 daemon.info dnsmasq[5592]: read /etc/hosts - 12 names
Thu Jul 25 09:43:52 2024 daemon.info dnsmasq[5592]: read /tmp/hosts/dhcp.cfg01411c - 4 names
Thu Jul 25 09:43:52 2024 daemon.info dnsmasq-dhcp[5592]: read /etc/ethers - 0 addresses
Thu Jul 25 09:43:54 2024 user.notice firewall: Reloading firewall due to ifup of mob1s1a1_4 (qmimux0)
Thu Jul 25 09:43:57 2024 kern.notice kernel: User "admin" changed ping_reboot configuration
Thu Jul 25 09:44:00 2024 cron.err crond[3630]: crond (busybox 1.34.1) started, log level 5
Thu Jul 25 09:44:00 2024 daemon.info dnsmasq[5592]: read /etc/hosts - 12 names
Thu Jul 25 09:44:00 2024 daemon.info dnsmasq[5592]: read /tmp/hosts/dhcp.cfg01411c - 4 names
Thu Jul 25 09:44:00 2024 daemon.info dnsmasq-dhcp[5592]: read /etc/ethers - 0 addresses
Thu Jul 25 09:44:03 2024 kern.info Mobile data connected (internal modem)
Thu Jul 25 09:44:03 2024 kern.info Joined LTE network (internal modem)
Thu Jul 25 09:44:03 2024 kern.info Connected to Verizon Wireless operator (internal modem)