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##################
Connectivity Tests
##################
************************
Basic Connectivity Tests
************************
Verifying connectivity can be done with the familiar `ping` and `traceroute`
commands. The options for each are shown (the options for each command were
displayed using the built-in help as described in the :ref:`cli`
section and are omitted from the output here):
.. opcmd:: ping <destination>
Send ICMP echo requests to destination host. There are multiple options to
ping, including VRF support.
.. code-block:: none
vyos@vyos:~$ ping 10.1.1.1
Possible completions:
<Enter> Execute the current command
adaptive Ping options
allow-broadcast
audible
bypass-route
count
deadline
do-not-fragment
flood
interface
interval
mark
no-loopback
numeric
pattern
quiet
record-route
size
timestamp
tos
ttl
verbose
vrf
.. opcmd:: traceroute <destination>
Trace path to target.
.. code-block:: none
vyos@vyos:~$ traceroute
Possible completions:
<hostname> Track network path to specified node
<x.x.x.x>
<h:h:h:h:h:h:h:h>
ipv4 Track network path to <hostname|IPv4 address>
ipv6 Track network path to <hostname|IPv6 address>
***************************
Advanced Connectivity Tests
***************************
.. opcmd:: monitor traceroute <destination>
However, another helper is available which combines ping and traceroute
into a single tool. An example of its output is shown:
.. code-block:: none
vyos@vyos:~$ mtr 10.62.212.12
My traceroute [v0.85]
vyos (0.0.0.0)
Keys: Help Display mode Restart statistics Order of fields quit
Packets Pings
Host Loss% Snt Last Avg Best Wrst StDev
1. 10.11.110.4 0.0% 34 0.5 0.5 0.4 0.8 0.1
2. 10.62.255.184 0.0% 34 1.1 1.0 0.9 1.4 0.1
3. 10.62.255.71 0.0% 34 1.4 1.4 1.3 2.0 0.1
4. 10.62.212.12 0.0% 34 1.6 1.6 1.6 1.7 0.0
.. note:: The output consumes the screen and will replace your command
prompt.
Several options are available for changing the display output. Press `h` to
invoke the built in help system. To quit, just press `q` and you'll be
returned to the VyOS command prompt.
***********************
IPv6 Topology Discovery
***********************
IPv6 uses different techniques to discover its Neighbors/topology.
Router Discovery
================
.. opcmd:: force ipv6-rd interface <interface> [address <ipv6-address>]
Discover routers via eth0.
Example:
.. code-block:: none
vyos@vyos:~$ force ipv6-rd interface eth0
Soliciting ff02::2 (ff02::2) on eth0...
Hop limit : 60 ( 0x3c)
Stateful address conf. : No
Stateful other conf. : No
Mobile home agent : No
Router preference : high
Neighbor discovery proxy : No
Router lifetime : 1800 (0x00000708) seconds
Reachable time : unspecified (0x00000000)
Retransmit time : unspecified (0x00000000)
Prefix : 240e:fe:8ca7:ea01::/64
On-link : Yes
Autonomous address conf.: Yes
Valid time : 2592000 (0x00278d00) seconds
Pref. time : 14400 (0x00003840) seconds
Prefix : fc00:470:f1cd:101::/64
On-link : Yes
Autonomous address conf.: Yes
Valid time : 2592000 (0x00278d00) seconds
Pref. time : 14400 (0x00003840) seconds
Recursive DNS server : fc00:470:f1cd::ff00
DNS server lifetime : 600 (0x00000258) seconds
Source link-layer address: 00:98:2B:F8:3F:11
from fe80::298:2bff:fef8:3f11
Neighbor Discovery
==================
.. opcmd:: force ipv6-nd interface <interface> address <ipv6-address>
Example:
.. code-block:: none
vyos@vyos:~$ force ipv6-nd interface eth0 address fc00:470:f1cd:101::1
Soliciting fc00:470:f1cd:101::1 (fc00:470:f1cd:101::1) on eth0...
Target link-layer address: 00:98:2B:F8:3F:11 from fc00:470:f1cd:101::1
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