How to enable internet with WiFi router and SIM card to Nvidia Tegra?

Hello,
I try to combine several GPUs into one network.
This is my current configuration

nvidia@tegra-ubuntu:~$ ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:04:4b:dd:55:03
          inet addr:192.168.8.2  Bcast:192.168.8.255  Mask:255.255.255.0
          inet6 addr: fe80::204:4bff:fedd:5503/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1629 errors:0 dropped:0 overruns:0 frame:0
          TX packets:563 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:119881 (119.8 KB)  TX bytes:1078134 (1.0 MB)
          Interrupt:42
nvidia@tegra-ubuntu:~$

I can ping the router

nvidia@tegra-ubuntu:~$ ping 192.168.8.1
PING 192.168.8.1 (192.168.8.1) 56(84) bytes of data.
64 bytes from 192.168.8.1: icmp_seq=1 ttl=64 time=0.614 ms
64 bytes from 192.168.8.1: icmp_seq=2 ttl=64 time=0.508 ms
^Z
[1]+  Stopped                 ping 192.168.8.1
nvidia@tegra-ubuntu:~$

Also i can ping from Tegra my remote laptop.
My router has standard settings with:
IP 192.168.8.1
The DHCP server is enabled
DHCP IP range 192.168.8.2 to 192.168.8.30

My remote laptop connected to router via WiFi.
Tegra is connected to the router by LAN. The laptop has a connection to the internet (web pages are opening).
Tegra can not open any pages. But as I said before it can ping router and laptop IPs.

As a manual for network connection, I use this link https://linux.m2osw.com/setup-static-network-jetson-tx2
I added these command into the /etc/network/interface

# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:

# The loopback network interfaces

auto lo
iface lo inet loopback

# The primary network interfaces
auto eth0
iface eth0 inet static
address 192.168.8.2
netmask 255.255.255.0
gateway 192.168.8.1
network 192.168.8.0
broadcast 192.168.8.255
nvidia@tegra-ubuntu:~$ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.8.1     0.0.0.0         UG    0      0        0 eth0
link-local      *               255.255.0.0     U     100    0        0 eth1
172.17.0.0      *               255.255.0.0     U     0      0        0 docker0
192.168.8.0     *               255.255.255.0   U     0      0        0 eth0
192.168.55.0    *               255.255.255.0   U     0      0        0 l4tbr0
224.0.0.0       *               240.0.0.0       U     100    0        0 eth1
nvidia@tegra-ubuntu:~$

When i ping not an IP address but some pages i get this message

nvidia@tegra-ubuntu:~$ ping www.ibm.com
ping: unknown host www.ibm.com
nvidia@tegra-ubuntu:~$

Does anybody know about this problem?