Hi Christian,
thank you for suggestions!

Here, the tcp_terminal is nagging about a missing policy configuration
for a client  session request labeled 'vfs -> '. Thus, it may be good
to provide one in the <config> of tcp_terminal. Let's look into
tcp_terminal.run.

...

The configuration defines a policy for test-terminal_echo that can
easily be changed to the demands of your scenario.

 <policy label_prefix="vfs" port="<desired port>"/>

or even

 <policy label="vfs -> " port="<desired port>»/>

it helps to get rid of message, but does not help to solve the problem of attachment of bash to tcp_terminal (failed to create <terminal> VFS node below)
I want something like
nic(tcp with port 8888) -> tcp_terminal -> bash 

If I follow your suggestion then it seems that I mentioned 2 separate port: 
 <policy label_prefix="vfs" port=«8888»/>
 <policy label_prefix=«/bin/bash" port="8888"/>
while in my idea I probably need only one, not clear the meaning of second mention of port...

result log is:
[init] child "timer" announces service "Timer"
[init] child "rtc_drv" announces service "Rtc"
[init] child "nic_router" announces service "Nic"
[init] child "nic_router" announces service "Uplink"
Warning: invalid signal-context capability
[init -> terminal] lwIP Nic interface down
[init -> terminal] --- TCP terminal started ---
[init] child "terminal" announces service "Terminal"
[init -> vfs] Error: Terminal-session creation failed (ram_quota=10240, cap_quota=3, label="")
[init -> vfs] Error: failed to create <terminal> VFS node
[init] child "vfs" announces service "File_system"
[init] child "vfs_rom" announces service "ROM"
[init -> /bin/bash]   0x1000000 .. 0x10ffffff: linker area
[init -> /bin/bash]   0x40000000 .. 0x4fffffff: stack area
[init -> /bin/bash]   0x50000000 .. 0x601b1fff: ld.lib.so
[init -> /bin/bash]   0x10e2c000 .. 0x10ffffff: libc.lib.so
[init -> /bin/bash]   0x10d87000 .. 0x10e2bfff: vfs.lib.so
[init -> /bin/bash]   0x10d45000 .. 0x10d86fff: libm.lib.so
[init -> /bin/bash]   0x10d3d000 .. 0x10d44fff: posix.lib.so
[init -> terminal] Warning: read blocked until lwIP interface is ready
[init -> terminal] lwIP Nic interface up address=10.0.3.2 netmask=255.255.255.0 gateway=10.0.3.1
[init -> terminal] listening on port 8888...
[init -> terminal] connection established

I am able to connect telnet localhost 5555 -but no command can be executed and log say that bind to port 8888 failed right after telnet.
[init -> terminal] listening on port 8888...
[init -> terminal] connection established
[init -> /bin/bash] Error: no plugin found for fcntl(3)
[init -> /bin/bash] Error: no plugin found for fcntl(4)
[init -> /bin/bash] Error: no plugin found for fcntl(5)
[init -> /bin/bash] Error: no plugin found for fcntl(6)
[init -> /bin/bash] Error: no plugin found for fcntl(7)
[init -> /bin/bash] Error: no plugin found for fcntl(8)
[init -> /bin/bash] Error: no plugin found for fcntl(9)
[init -> /bin/bash] Error: no plugin found for fcntl(10)
[init -> /bin/bash] Error: no plugin found for fcntl(11)
[init -> /bin/bash] Error: no plugin found for fcntl(12)
[init -> /bin/bash] Error: no plugin found for fcntl(13)
[init -> /bin/bash] Error: no plugin found for fcntl(14)
[init -> /bin/bash] Error: no plugin found for fcntl(15)
[init -> /bin/bash] Error: no plugin found for fcntl(16)
[init -> /bin/bash] Error: no plugin found for fcntl(17)
[init -> /bin/bash] Error: no plugin found for fcntl(18)
[init -> /bin/bash] Error: no plugin found for fcntl(19)
[init -> terminal] Error: bind to port 8888 failed
Kernel: Bad memory access (signum=7), see Linux kernel log for details

I am stuck a bit and move to ssh.run example, integrating it with toolchain test.
here I have to setup ssh_server and use ssh client from outside instead of telnet.

In this moment it works somehow and I am trying to force toolchain to work inside genode.

Sincerely,
Alexander