Network - Revision history

Boiarino at 16:54, 4 February 2026

2026-02-04T16:54:28Z

← Older revision		Revision as of 12:54, 4 February 2026
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	'''NOTE:''' when setting secondary ports in ''nmtui'', always specify jlab default 'DNS servers' and 'Search domains', just in case !!! It looks like it prevents ''/etc/resolv.conf'' from being overwritten under certain circumstances.		'''NOTE:''' when setting secondary ports in ''nmtui'' as ''manual'', always specify jlab default 'DNS servers' and 'Search domains', just in case !!! It looks like it prevents ''/etc/resolv.conf'' from being overwritten under certain circumstances, for example:

			┌───────────────────────────┤ Edit Connection ├───────────────────────────┐
			│ │
			│ Profile name enp161s0np0_____________________________ │
			│ Device enp161s0np0 (94:6D:AE:EF:87:68)_________ │
			│ │
			│ ═ ETHERNET <Show> │
			│ ═ 802.1X SECURITY <Show> │
			│ │
			│ ╤ IPv4 CONFIGURATION <Manual> <Hide> │
			│ │ Addresses 129.57.69.10/24__________ <Remove> │
			│ │ <Add...> │
			│ │ Gateway 129.57.69.1______________ │
			│ │ DNS servers 129.57.90.255____________ <Remove> │
			│ │ 129.57.32.101____________ <Remove> │
			│ │ <Add...> │
			│ │ Search domains jlab.org_________________ <Remove> │
			│ │ acc.jlab.org_____________ <Remove> │
			│ │ <Add...> │
			│ │ │
			│ │ Routing (No custom routes) <Edit...> │
			│ │ [ ] Never use this network for default route │
			│ │ [X] Ignore automatically obtained routes │
			│ │ [X] Ignore automatically obtained DNS parameters │
			│ │ │
			│ │ [ ] Require IPv4 addressing for this connection │
			│ └ │
			│ │
			│ ═ IPv6 CONFIGURATION <Automatic> <Show> │
			│ │
			│ [X] Automatically connect │
			│ [X] Available to all users │
			│ │
			│ <Cancel> <OK> │
			│

	'''NOTE:''' after changing network,you may need to reboot machine to update ''nmtui''.		'''NOTE:''' after changing network,you may need to reboot machine to update ''nmtui''.

Boiarino: /* Bond two network ports together, links to the switch (example for clonfarm21) */

2025-10-14T20:52:34Z

Bond two network ports together, links to the switch (example for clonfarm21)

← Older revision		Revision as of 16:52, 14 October 2025
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	more /etc/NetworkManager/system-connections/enp_bond.nmconnection		more /etc/NetworkManager/system-connections/enp_bond.nmconnection

			It can be done temporary, for example for interface ''ens2np0'':

			ip link set dev ens2np0 mtu 9000

			To apply changes, restart NetworkManager:

			systemctl restart NetworkManager

			or bring the connection down and up:

			nmcli connection down ens2np0
			nmcli connection up ens2np0


	To delete bond, run following command:		To delete bond, run following command:

Boiarino: /* Bond two network ports together, links to the switch (example for clonfarm21) */

2025-10-14T20:39:56Z

Bond two network ports together, links to the switch (example for clonfarm21)

← Older revision		Revision as of 16:39, 14 October 2025
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	cat /sys/class/net/enp_bond/bonding/xmit_hash_policy		cat /sys/class/net/enp_bond/bonding/xmit_hash_policy

			'''NOTE''': to change frame size (default mtu=1500), do following

			nmcli connection modify enp_bond 802-3-ethernet.mtu 9000

			to check result (and other setting):

			more /etc/NetworkManager/system-connections/enp_bond.nmconnection

	To delete bond, run following command:		To delete bond, run following command:

Boiarino: /* Bond two network ports together, links to the switch (example for clonfarm21) */

2025-10-14T19:53:46Z

Bond two network ports together, links to the switch (example for clonfarm21)

← Older revision		Revision as of 15:53, 14 October 2025
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	'''NOTE''': in our case, enp_bond inheritate mac from ens2np0, but IP from ens7np0; only ens7np0 was registered on jnet.		'''NOTE''': in our case, enp_bond inheritate mac from ens2np0, but IP from ens7np0; only ens7np0 was registered on jnet.

			'''NOTE''': to change hash policy to ''layer3+4'', do following

			echo 1 > /sys/class/net/enp_bond/bonding/xmit_hash_policy
			cat /sys/class/net/enp_bond/bonding/xmit_hash_policy


	To delete bond, run following command:		To delete bond, run following command:

	nmcli connection delete enp_bond		nmcli connection delete enp_bond


	== Bond four network ports together, links to Maroc electronics (example for clondaq9) ==		== Bond four network ports together, links to Maroc electronics (example for clondaq9) ==

Boiarino at 19:52, 14 October 2025

2025-10-14T19:52:16Z

← Older revision		Revision as of 15:52, 14 October 2025
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	~~'''~~Display traffic~~'''~~		== Display traffic ==

	nload -i 10000000 -o 10000000 p6p1		nload -i 10000000 -o 10000000 p6p1
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	'''NOTE:''' New links will shows up as ''Wired connection ..'', so run ''nmtui'', and in every new connection change ''Profile name'' from ''Wired connection ..'' to the actual device name, like ''enp0s29u1u6'', to avoid confusion while setting bond later.		'''NOTE:''' New links will shows up as ''Wired connection ..'', so run ''nmtui'', and in every new connection change ''Profile name'' from ''Wired connection ..'' to the actual device name, like ''enp0s29u1u6'', to avoid confusion while setting bond later.

	~~'''~~Local network configuring using nmtui - example~~'''~~		== Local network configuring using nmtui - example ==

	┌───────────────────────────┤ Edit Connection ├───────────────────────────┐		┌───────────────────────────┤ Edit Connection ├───────────────────────────┐
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	~~'''~~Bond two network ports together, links to the switch (example for clonfarm21)~~'''~~		== Bond two network ports together, links to the switch (example for clonfarm21) ==

	nmcli connection add type bond con-name enp_bond ifname enp_bond bond.options mode=802.3ad		nmcli connection add type bond con-name enp_bond ifname enp_bond bond.options mode=802.3ad
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	~~'''~~Bond four network ports together, links to Maroc electronics (example for clondaq9)~~'''~~		== Bond four network ports together, links to Maroc electronics (example for clondaq9) ==

	nmcli connection add type bond con-name enp_bond ifname enp_bond bond.options mode=broadcast		nmcli connection add type bond con-name enp_bond ifname enp_bond bond.options mode=broadcast

Boiarino at 20:09, 13 June 2025

2025-06-13T20:09:29Z

← Older revision		Revision as of 16:09, 13 June 2025
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	'''NOTE:''' when setting secondary ports in ''nmtui'', always specify jlab default 'DNS servers' and 'Search domains', just in case !!! It looks like it prevents ''/etc/resolv.conf'' from being overwritten under certain circumstances.		'''NOTE:''' when setting secondary ports in ''nmtui'', always specify jlab default 'DNS servers' and 'Search domains', just in case !!! It looks like it prevents ''/etc/resolv.conf'' from being overwritten under certain circumstances.

	'''NOTE"''' after changing network, ~~always~~ reboot machine to update ''nmtui''. New links will shows up as ''Wired connection ..'', so run ''nmtui'', and in every new connection change ''Profile name'' from ''Wired connection ..'' to the actual device name, like ''enp0s29u1u6'', to avoid confusion while setting bond later.		'''NOTE:''' after changing network,you may need to reboot machine to update ''nmtui''.

			'''NOTE:''' New links will shows up as ''Wired connection ..'', so run ''nmtui'', and in every new connection change ''Profile name'' from ''Wired connection ..'' to the actual device name, like ''enp0s29u1u6'', to avoid confusion while setting bond later.

	'''Local network configuring using nmtui - example'''		'''Local network configuring using nmtui - example'''

Boiarino at 20:03, 13 June 2025

2025-06-13T20:03:37Z

← Older revision		Revision as of 16:03, 13 June 2025
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	'''Bond ~~two~~ network ports together, links to Maroc electronics (example for clondaq9)'''		'''Bond four network ports together, links to Maroc electronics (example for clondaq9)'''

	nmcli connection add type bond con-name enp_bond ifname enp_bond bond.options mode=broadcast		nmcli connection add type bond con-name enp_bond ifname enp_bond bond.options mode=broadcast

Boiarino at 18:20, 12 May 2025

2025-05-12T18:20:06Z

← Older revision		Revision as of 14:20, 12 May 2025
Line 68:		Line 68:
	Set [[Routing]] if needed.		Set [[Routing]] if needed.

	Run 'nmtui', you can actually do there everything what was done above. In addition, set mode 'Broadcast' (IMPORTANT !), and MII=100/0/0.		Run 'nmtui', you can actually do there everything what was done above. In addition, set mode '''Broadcast''' (IT IS IMPORTANT !), and MII=100/0/0.

	Finally, disactivate both ens2np0 and ens7np0, and activate enp_bond; using 'nmtui', or command 'nmcli connection down/up <connection>'.		Finally, disactivate both ens2np0 and ens7np0, and activate enp_bond; using 'nmtui', or command 'nmcli connection down/up <connection>'.

Boiarino at 18:19, 12 May 2025

2025-05-12T18:19:26Z

← Older revision		Revision as of 14:19, 12 May 2025
Line 68:		Line 68:
	Set [[Routing]] if needed.		Set [[Routing]] if needed.

	~~You can use~~ 'nmtui' ~~as well to program all~~ above.		Run 'nmtui', you can actually do there everything what was done above. In addition, set mode 'Broadcast' (IMPORTANT !), and MII=100/0/0.

	Finally, disactivate both ens2np0 and ens7np0, and activate enp_bond; using 'nmtui', or command 'nmcli connection down/up <connection>'.		Finally, disactivate both ens2np0 and ens7np0, and activate enp_bond; using 'nmtui', or command 'nmcli connection down/up <connection>'.

Boiarino at 15:29, 14 January 2025

2025-01-14T15:29:58Z

← Older revision		Revision as of 11:29, 14 January 2025
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	''nmtui'' screen should looks like this:		Run ''nmtui'' and fix remaining details - screen should looks like this:
	┌────────────────────────────┤ Edit Connection ├────────────────────────────┐		┌────────────────────────────┤ Edit Connection ├────────────────────────────┐
	│ │		│ │
Line 108:		Line 108:
	│ │ Slaves │		│ │ Slaves │
	│ │ ┌─────────────────────────────────────────────────┐ │		│ │ ┌─────────────────────────────────────────────────┐ │
	│ │ │ bond-slave-~~enp0s20u6~~ ↑ │ <Add> │		│ │ │ bond-slave-enp0s29u1u6 ↑ │ <Add> │
			│ │ │ bond-slave-enp0s29u1u5 ▒ │ │
			│ │ │ bond-slave-enp0s20u6 ▒ │ <Edit...> │
	│ │ │ bond-slave-enp0s20u5 ▒ │ │		│ │ │ bond-slave-enp0s20u5 ▒ │ │
	~~│ │ │ ▮ │ <Edit...> │~~
	~~│ │ │ ▒ │ │~~
	│ │ │ ▒ │ <Delete> │		│ │ │ ▒ │ <Delete> │
	│ │ │ ↓ │ │		│ │ │ ↓ │ │