Network/Renumbering: Difference between revisions

From NURDspace
 
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Line 10: Line 10:
! Segment !! Purpose
! Segment !! Purpose
|-
|-
| 10.208.0.[1..254] || network devices
| 10.208.0.[1..255] || network devices
|-
|-
| 10.208.1.[1..254] || servers
| 10.208.1.[0..255] || servers
|-
|-
| 10.208.[34].[1..254] || clients / dhcp
| 10.208.[23].[0..254] || clients / dhcp
|}
|}


Gateway: 10.208.0.1
Gateway: 10.208.0.1
DNS: 10.208.1.53
DNS: 10.208.1.53


Line 27: Line 28:
## <s>Make inventory of 10.208.20.0/24</s>
## <s>Make inventory of 10.208.20.0/24</s>
## <s>Make inventory of 10.208.30.0/24</s>
## <s>Make inventory of 10.208.30.0/24</s>
## Add 10.208.0.1/22 as an ip address on the gateway
## <s> Add 10.208.0.1/22 as an ip address on the gateway</s>
# Execution (for each server host)
# Execution (for each server host)
## Find new ip address in correct segment
## Find new ip address in correct segment
Line 47: Line 48:
## Cleanup all traces of 10.208.20.0/24
## Cleanup all traces of 10.208.20.0/24
## Cleanup all traces of 10.208.30.0/24
## Cleanup all traces of 10.208.30.0/24


= 10.208.10.0/24 =
= 10.208.10.0/24 =
Line 58: Line 58:
! style="text-align:left;"| Device type
! style="text-align:left;"| Device type
! style="text-align:left;"| New IP
! style="text-align:left;"| New IP
! style="text-align:left;"| Reconfigured?
! style="text-align:left;"| Notes
! style="text-align:left;"| Notes
|-
|-
Line 64: Line 65:
|network
|network
|10.208.0.1
|10.208.0.1
|
|
|
|-
|-
Line 70: Line 72:
|server
|server
|10.208.1.1
|10.208.1.1
|Yes
|
|
|-
|-
Line 76: Line 79:
|server
|server
|10.208.1.2
|10.208.1.2
|Yes
|
|
|-
|-
Line 82: Line 86:
|server
|server
|10.208.1.3
|10.208.1.3
|Yes
|Old machine, take special care
|Old machine, take special care
|-
|-
Line 88: Line 93:
|server
|server
|10.208.1.4
|10.208.1.4
|Yes
|
|
|-
|-
Line 94: Line 100:
|server
|server
|10.208.1.5
|10.208.1.5
|Yes
|
|
|-
|-
Line 100: Line 107:
|server
|server
|10.208.1.6
|10.208.1.6
|Yes
|
|
|-
|-
Line 106: Line 114:
|server
|server
|10.208.1.7
|10.208.1.7
|Yes
|
|
|-
|-
Line 112: Line 121:
|server
|server
|10.208.1.8
|10.208.1.8
|Yes
|
|
|-
|-
Line 118: Line 128:
|server
|server
|10.208.1.9
|10.208.1.9
|???
|Yes
|
|-
|-
|10.208.11.30
|10.208.11.30
Line 124: Line 135:
|server
|server
|10.208.1.10
|10.208.1.10
|TODO: weird ip config
|Forgotten migration project?
|Forgotten migration project?
|-
|-
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|server
|server
|10.208.1.11
|10.208.1.11
|Yes
|
|
|-
|-
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|server
|server
|10.208.1.12
|10.208.1.12
|TODO: weird ip config
|
|
|-
|-
Line 142: Line 156:
|server
|server
|10.208.1.13
|10.208.1.13
|Yes
|
|
|-
|-
Line 148: Line 163:
|server
|server
|10.208.1.14
|10.208.1.14
|Yes
|still used??
|still used??
|-
|-
Line 154: Line 170:
|server
|server
|10.208.1.15
|10.208.1.15
|Yes
|
|
|-
|-
Line 160: Line 177:
|server
|server
|10.208.1.16
|10.208.1.16
|Yes
|NAT rules on gateway
|NAT rules on gateway
|}
|}
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! style="text-align:left;"| Device type
! style="text-align:left;"| Device type
! style="text-align:left;"| New IP
! style="text-align:left;"| New IP
! style="text-align:left;"| Reconfigured?
! style="text-align:left;"| Notes
! style="text-align:left;"| Notes
|-
|-
Line 178: Line 197:
|network
|network
|10.208.0.1
|10.208.0.1
|
|
|
|-
|-
Line 184: Line 204:
|network
|network
|10.208.0.2
|10.208.0.2
|Yes
|
|-
|10.208.30.3
|zaal1-sw.lan.nurd.space
|network
|10.208.0.3
|Yes
|
|
|-
|-
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|server
|server
|10.208.1.17
|10.208.1.17
|Yes
|
|
|-
|-
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|server
|server
|10.208.1.18
|10.208.1.18
|Yes
|
|
|-
|-
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|server
|server
|10.208.1.19
|10.208.1.19
|Yes
|
|
|-
|-
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|server
|server
|10.208.1.21
|10.208.1.21
|Yes
|
|
|-
|-
Line 219: Line 251:
|webmpd.vm.nurd.space
|webmpd.vm.nurd.space
|server
|server
|10.208.1.22
|
|still used??
|
|removed
|-
|-
|10.208.30.19
|10.208.30.19
Line 226: Line 259:
|server
|server
|10.208.1.23
|10.208.1.23
|Yes
|
|
|-
|-
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|network
|network
|10.208.0.3
|10.208.0.3
|Yes
|
|
|-
|-
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|server
|server
|10.208.1.24
|10.208.1.24
|Yes
|
|
|-
|-
Line 244: Line 280:
|server
|server
|10.208.1.25
|10.208.1.25
|Yes
|
|
|-
|-
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|server
|server
|10.208.1.26
|10.208.1.26
|Yes
|
|
|-
|-
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|server
|server
|10.208.1.27
|10.208.1.27
|Yes
|
|
|-
|-
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|server
|server
|10.208.1.28
|10.208.1.28
|Yes
|
|
|-
|-
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|server
|server
|10.208.1.29
|10.208.1.29
|Yes
|
|
|-
|-
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|server
|server
|10.208.1.30
|10.208.1.30
|Yes
|
|
|-
|-
Line 286: Line 328:
|server
|server
|10.208.1.31
|10.208.1.31
|Yes
|
|
|-
|-
Line 292: Line 335:
|server
|server
|10.208.1.32
|10.208.1.32
|Yes
|
|
|-
|-
Line 304: Line 348:
|server
|server
|10.208.1.34
|10.208.1.34
|Yes
|
|
|-
|-
Line 309: Line 354:
|pdu01.lan.nurd.space
|pdu01.lan.nurd.space
|server
|server
|10.208.1.35
|10.208.1.47
|Yes
 
|
|
|-
|-
Line 315: Line 362:
|epc2.lan.nurd.space
|epc2.lan.nurd.space
|server
|server
|10.208.1.36
|10.208.1.44
|Yes
|
|
|-
|-
Line 321: Line 369:
|epc3.lan.nurd.space
|epc3.lan.nurd.space
|server
|server
|10.208.1.37
|10.208.1.45
|Yes
|
|
|-
|-
Line 327: Line 376:
|epc4.lan.nurd.space
|epc4.lan.nurd.space
|server
|server
|10.208.1.38
|10.208.1.46
|Yes
|
|
|-
|-
Line 334: Line 384:
|server
|server
|10.208.1.39
|10.208.1.39
|Yes
|
|
|-
|-
Line 345: Line 396:
|nurdservices.lan.nurd.space
|nurdservices.lan.nurd.space
|server
|server
|10.208.1.53
|10.208.1.42, 10.208.1.53
|Yes
|Maybe use this alias for DNS?
|Maybe use this alias for DNS?
|}
|}
= Reconfiguring a server =
== Modify the network configuration ==
=== /etc/network/interfaces ===
vi /etc/network/interfaces
Modify the contents to the following:
address <new ip address>/22
gateway 10.208.0.1
post-up ip addr add <old ip address>/24 dev eth0
=== NetworkManager ===
nmcl connection edit <interface>
set ipv4.addresses <new ip address>/22
set ipv4.gateway 10.208.0.1
save persistent
=== Netplan ===
vi /etc/netplan/00-installer-config.yaml
* Add new ip address under network.ethernets.<network card>.addresses
* Change the default route to point to 10.208.0.1
== Apply the configuration without rebooting ==
Login to the server via gateway.lan.nurd.space (you need to be in a directly attached subnet for the server for this step)
ip addr add <new ip address>/22 dev <network card> && ip route delete default && ip route add default via 10.208.0.1

Latest revision as of 15:51, 28 April 2023

Introduction

We need to renumber the network to reduce the latency spikes we see every now and then. The working theory is that, during network load, and because of the roundtrips on traffic between different subnets, and based on the drops in all gateway graphs in icinga, that the cpu of the edgerouter is occasionally at its limits, causing packetloss and high-latency.

To fix this, the network will be renumbered into a single subnet. This should be done in a least disruptive manner as possible

New numberplan

Subnet: 10.208.0.0/22 Netmask: 255.255.252.0

Segment Purpose
10.208.0.[1..255] network devices
10.208.1.[0..255] servers
10.208.[23].[0..254] clients / dhcp

Gateway: 10.208.0.1

DNS: 10.208.1.53

Renumbering procedure

This is only for servers; Everything in the dhcp range will be managed by changing the dhcp start/end addresses. Note that we will need to check if devices in the dhcp range are configured with a static ip and if so, we need to reconfigure them to dhcp and fix their ip address in dhcp.

  1. Preparation
    1. Make inventory of 10.208.10.0/24
    2. Make inventory of 10.208.11.0/24
    3. Make inventory of 10.208.20.0/24
    4. Make inventory of 10.208.30.0/24
    5. Add 10.208.0.1/22 as an ip address on the gateway
  2. Execution (for each server host)
    1. Find new ip address in correct segment
    2. Configure new ip address as a primary ip
    3. Configure the old ip as a secondary ip
    4. Reconfigure DNS
  3. Migration of servers (this is done on a host-by-host basis)
    1. Watch for incoming traffic on the old ip address
    2. Find out which device is connected to the source ip's
    3. Reconfigure these devices to connect to the new ip (preferrably via dns)
    4. Repeat until no traffic arrives on old ip address
    5. Remove old ip address from server
  4. Migration of clients
    1. Reconfigure clients that have a static ip to receive that from the new dhcp range & reconfigure the devices for dhcp
    2. Set the dhcp range to 10.208.2.1 .. 10.208.3.254
  5. Finalize configuration
    1. Cleanup all traces of 10.208.10.0/24
    2. Cleanup all traces of 10.208.11.0/24
    3. Cleanup all traces of 10.208.20.0/24
    4. Cleanup all traces of 10.208.30.0/24

10.208.10.0/24

Range is empty, yay

10.208.11.0/24

IP Host Device type New IP Reconfigured? Notes
10.208.11.1 gw.vm.nurd.space network 10.208.0.1
10.208.11.2 wekan.vm.nurd.space server 10.208.1.1 Yes
10.208.11.4 auth.vm.nurd.space server 10.208.1.2 Yes
10.208.11.6 revproxy01.vm.nurd.space server 10.208.1.3 Yes Old machine, take special care
10.208.11.7 gitea.vm.nurd.space server 10.208.1.4 Yes
10.208.11.8 docker.vm.nurd.space server 10.208.1.5 Yes
10.208.11.10 parts.vm.nurd.space server 10.208.1.6 Yes
10.208.11.11 soundfx.vm.nurd.space server 10.208.1.7 Yes
10.208.11.13 asterisk.vm.nurd.space server 10.208.1.8 Yes
10.208.11.26 portal.vm.nurd.space server 10.208.1.9 Yes
10.208.11.30 jarvis2.vm.nurd.space server 10.208.1.10 TODO: weird ip config Forgotten migration project?
10.208.11.31 influx.vm.nurd.space server 10.208.1.11 Yes
10.208.11.32 jarvis.vm.nurd.space server 10.208.1.12 TODO: weird ip config
10.208.11.42 ipam.vm.nurd.space. server 10.208.1.13 Yes
10.208.11.111 ldap-dev.vm.nurd.space server 10.208.1.14 Yes still used??
10.208.11.210 postgresql.vm.nurd.space server 10.208.1.15 Yes
10.208.11.250 egg.vm.nurd.space server 10.208.1.16 Yes NAT rules on gateway

10.208.20.0/24

Range is empty, yay

10.208.30.0/24

IP Host Device type New IP Reconfigured? Notes
10.208.30.1 gateway.lan.nurd.space network 10.208.0.1
10.208.30.2 core-sw.lan.nurd.space network 10.208.0.2 Yes
10.208.30.3 zaal1-sw.lan.nurd.space network 10.208.0.3 Yes
10.208.30.4 slabpi.lan.nurd.space server 10.208.1.17 Yes
10.208.30.6 backup.vm.nurd.space server 10.208.1.18 Yes
10.208.30.7 sdr.vm.nurd.space server 10.208.1.19 Yes
10.208.30.10 ticktack.lan.nurd.space server 10.208.1.20
10.208.30.11 librenms.vm.nurd.space server 10.208.1.21 Yes
10.208.30.18 webmpd.vm.nurd.space server removed
10.208.30.19 spacesound.vm.nurd.space server 10.208.1.23 Yes
10.208.30.21 zaal1-ap.lan.nurd.space network 10.208.0.3 Yes
10.208.30.24 gpu.vm.nurd.space server 10.208.1.24 Yes
10.208.30.40 mongodb.vm.nurd.space server 10.208.1.25 Yes
10.208.30.60 harmony.lan.nurd.space server 10.208.1.26 Yes
10.208.30.66 nurdwiki-migration.lan.nurd.space server will not be migrated
10.208.30.67 harkbot.vm.nurd.space server 10.208.1.27 Yes
10.208.30.68 ticker-proxy.vm.nurd.space server 10.208.1.28 Yes
10.208.30.70 erratic.lan.nurd.space server 10.208.1.29 Yes
10.208.30.71 erratic-bmc.lan.nurd.space server 10.208.1.30 Yes
10.208.30.100 xmpp.vm.nurd.space server 10.208.1.31 Yes
10.208.30.101 monitor.vm.nurd.space server 10.208.1.32 Yes
10.208.30.110 ipfixer.lan.nurd.space server 10.208.1.33
10.208.30.111 iptv-server.lan.nurd.space server 10.208.1.34 Yes
10.208.30.150 pdu01.lan.nurd.space server 10.208.1.47 Yes
10.208.30.152 epc2.lan.nurd.space server 10.208.1.44 Yes
10.208.30.153 epc3.lan.nurd.space server 10.208.1.45 Yes
10.208.30.154 epc4.lan.nurd.space server 10.208.1.46 Yes
10.208.30.188 minecraft.vm.nurd.space server 10.208.1.39 Yes
10.208.30.222 lora-gateway.lan.nurd.space server 10.208.1.40
10.208.30.254 nurdservices.lan.nurd.space server 10.208.1.42, 10.208.1.53 Yes Maybe use this alias for DNS?

Reconfiguring a server

Modify the network configuration

/etc/network/interfaces

vi /etc/network/interfaces

Modify the contents to the following: 

address <new ip address>/22
gateway 10.208.0.1
post-up ip addr add <old ip address>/24 dev eth0

NetworkManager

nmcl connection edit <interface>
set ipv4.addresses <new ip address>/22
set ipv4.gateway 10.208.0.1
save persistent

Netplan

vi /etc/netplan/00-installer-config.yaml
  • Add new ip address under network.ethernets.<network card>.addresses
  • Change the default route to point to 10.208.0.1

Apply the configuration without rebooting

Login to the server via gateway.lan.nurd.space (you need to be in a directly attached subnet for the server for this step) 

ip addr add <new ip address>/22 dev <network card> && ip route delete default && ip route add default via 10.208.0.1
Retrieved from "https://nurdspace.nl/index.php?title=Network/Renumbering&oldid=13259"
Last modified
This page was last edited on 28 April 2023, at 15:51.