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Описание

Два WLC резервируют себя через протокол VRRP, интерфейс в сторону точек доступа подключен к коммутатору.

Резервирование и организация Uplink не рассматриваются в данной статье. 

Схема включения

Задача

Организовать резервирование контроллера WLC.

Решение

Настройка будет выполнена на базе заводской конфигурации (Factory). Интерфейс gi 1/0/1 смотрит в сторону Uplink, gi 1/0/2 — в сторону точек доступа.

Для решения поставленной задачи на каждом WLC необходимо:

  • Создать object-group для настройки firewall
  • Настроить VRRP на интерфейсах
  • Настроить Crypto-Sync для синхронизации сертификатов
  • Настроить WLC для синхронизации состояния точек доступа
  • Настроить Softgre-Controller для синхронизации туннелей
  • Настроить Firewall, разрешить обмен VRRP-анонсами и отрыть порты для синхронизации туннелей, сертификатов и состояния WLC
  • Настроить DHCP-сервер в режиме Active-Standby
  • Настроить DHCP failover


На интерфейсах, где включен vrrp необходимо включить:

  vrrp timers garp refresh 60

Данная команда определяет интервал, по истечении которого будет происходить периодическая отправка Gratuituous ARP-сообщения(ий), пока маршрутизатор находится в состоянии Master.

Адресация:

ИнтерфейсVLANWLC-1 IPWLC-2 IPVRRP IPОписание
Birdge 12449192.168.1.2/24192.168.1.3/24192.168.1.1/32Интерфейс для сети управления
Bridge 33192.168.2.2/24192.168.2.3/24192.168.2.1/32Интерфейс для клиентов Wi-Fi

Порты и протоколы, для которых нужно настроить Firewall:

СервисПротоколПортОписание
softgre-controllerTCP1337Используется для синхронизации softgre-туннелей
crypto-syncTCP873Используется для синхронизации сертификатов и состояния ТД
VRRPVRRP-Используется для резервирования 

Пример настройки WLC-1

Подключаемся к WLC и переходим в режим  конфигурирования 

wlc# config

Меняем  имя устройства

hostname WLC-1

Создаем vlan 2449

vlan 2449
  force-up
exit

Настраиваем интерфейс gi 1/0/2, для приема тегированного  трафика в VLAN 3 и 2449

interface gigabitethernet 1/0/2
  mode switchport
  switchport mode trunk
  switchport trunk allowed vlan add 3,2449
exit

Создаем object-group для настройки  Firewall

object-group service sync
  port-range 873
exit
object-group service softgre_controller
  port-range 1337
exit


Меняем адресацию и настраиваем  VRRP на Bridge

no bridge 1
no bridge 3

bridge 1
  vlan 2449
  security-zone trusted
  ip address 192.168.1.2/24
  vrrp priority 120
  vrrp id 1
  vrrp ip 192.168.1.1/32
  vrrp group 1
  vrrp preempt disable
  vrrp timers garp refresh 60
  vrrp
  no spanning-tree
  enable
exit 
bridge 3
  vlan 3
  mtu 1458
  security-zone users
  ip address 192.168.2.2/24
  vrrp priority 120 
  vrrp id 3
  vrrp ip 192.168.2.1/32
  vrrp group 1
  vrrp preempt disable
  vrrp timers garp refresh 60
  vrrp
  no spanning-tree
  enable
exit

Указываем адресацию резервируемых контроллеров и назначаем им группу:

ip failover
  local-address 192.168.1.2
  remote-address 192.168.1.3
  vrrp-group 1
exit


Настраиваем Crypto-Sync  для синхронизации сертификатов

crypto-sync
crypto-sync remote-delete

Настраиваем Softgre-Controller для синхронизации туннелей SoftGRE

softgre-controller
  failover
exit

Настраиваем WLC для синхронизации точек доступа

wlc
  failover
exit

Настраиваем правила Firewall, разрешаем протокол VRRP и порты для синхронизации  туннелей и сертификатов

security zone-pair trusted self
  rule 11
    action permit
    match protocol vrrp
    enable
  exit
  rule 12
    action permit
    match protocol tcp
    match destination-port object-group softgre_controller
    enable
  exit  
  rule 13
    action permit
    match protocol tcp
    match destination-port object-group sync
    enable
  exit
exit 
security zone-pair users self
  rule 11
    action permit
    match protocol vrrp
    enable
  exit
exit

Настраиваем DHCP сервер

no ip dhcp-server pool users-pool
no ip dhcp-server pool ap-pool

ip dhcp-server pool ap-pool
  network 192.168.1.0/24
  address-range 192.168.1.4-192.168.1.254
  default-router 192.168.1.1
  dns-server 192.168.1.1
  option 42 ip-address 192.168.1.1
  vendor-specific
    suboption 12 ascii-text "192.168.1.1"
    suboption 15 ascii-text "https://192.168.1.1:8043"
  exit
exit
ip dhcp-server pool users-pool
  network 192.168.2.0/24
  address-range 192.168.2.4-192.168.2.254
  default-router 192.168.2.1
  dns-server 192.168.2.1
exit

Настраиваем DHCP Failover

ip dhcp-server failover
  mode active-standby
  enable
exit

Создаем пользователя в локальном Radius сервере

radius-server local
  domain default
    user test
      password ascii-text 12345678
    exit
  exit
exit

Применяем и подтверждаем конфигурацию

wlc-1# commit 
wlc-1# confirm 

Полная конфигурация WLC-1

 Конфигурация
#!/usr/bin/clish
#260
#1.26.x
#01/05/2024
#11:54:29
hostname WLC-1

object-group service airtune
  port-range 8099
exit
object-group service dhcp_client
  port-range 68
exit
object-group service dhcp_server
  port-range 67
exit
object-group service dns
  port-range 53
exit
object-group service netconf
WLC-1# sh run extended 
#!/usr/bin/clish
#260
#1.26.x
#01/05/2024
#11:54:29
hostname WLC-1

object-group service airtune
  port-range 8099
exit
object-group service dhcp_client
  port-range 68
exit
object-group service dhcp_server
  port-range 67
exit
object-group service dns
  port-range 53
exit
object-group service netconf
  port-range 830
exit
object-group service ntp
  port-range 123
exit
object-group service radius_auth
  port-range 1812
exit
object-group service sa
  port-range 8043-8044
exit
object-group service ssh
  port-range 22
exit
object-group service sync
  port-range 873
exit
object-group service softgre_controller
  port-range 1337
exit

syslog max-files 3
syslog file-size 512
syslog file tmpsys:syslog/default
  severity info
exit

radius-server local
  nas ap
    key ascii-text encrypted 8CB5107EA7005AFF
    network 192.168.1.0/24
  exit
  nas local
    key ascii-text encrypted 8CB5107EA7005AFF
    network 127.0.0.1/32
  exit
  domain default
    user test
      password ascii-text encrypted CDE65039E5591FA3
    exit
  exit
  virtual-server default
    enable
  exit
  enable
exit
radius-server host 127.0.0.1
  key ascii-text encrypted 8CB5107EA7005AFF
exit
aaa radius-profile default_radius
  radius-server host 127.0.0.1
exit

boot host auto-config
boot host auto-update

vlan 3
  force-up
exit
vlan 2449
  force-up
exit
vlan 2
exit

no spanning-tree

domain lookup enable

security zone trusted
exit
security zone untrusted
exit
security zone users
exit

bridge 1
  vlan 2449
  security-zone trusted
  ip address 192.168.1.2/24
  vrrp id 1
  vrrp ip 192.168.1.1/32
  vrrp priority 120
  vrrp group 1
  vrrp preempt disable
  vrrp timers garp refresh 60
  vrrp
  no spanning-tree
  enable
exit
bridge 2
  vlan 2
  security-zone untrusted
  ip address dhcp
  no spanning-tree
  enable
exit
bridge 3
  vlan 3
  mtu 1458
  security-zone users
  ip address 192.168.2.2/24
  vrrp id 3
  vrrp ip 192.168.2.1/32
  vrrp priority 120
  vrrp group 1
  vrrp preempt disable
  vrrp timers garp refresh 60
  vrrp
  no spanning-tree
  enable
exit

interface gigabitethernet 1/0/1
  mode switchport
  switchport access vlan 2
exit
interface gigabitethernet 1/0/2
  mode switchport
  switchport mode trunk
  switchport trunk allowed vlan add 3,2449
exit
interface gigabitethernet 1/0/3
  mode switchport
exit
interface gigabitethernet 1/0/4
  mode switchport
exit
interface tengigabitethernet 1/0/1
  mode switchport
  switchport access vlan 2
exit
interface tengigabitethernet 1/0/2
  mode switchport
exit

tunnel softgre 1
  mode data
  local address 192.168.1.1
  default-profile
  enable
exit

ip failover
  local-address 192.168.1.2
  remote-address 192.168.1.3
  vrrp-group 1
exit

security zone-pair trusted self
  rule 10
    action permit
    match protocol tcp
    match destination-port object-group ssh
    enable
  exit
  rule 11
    action permit
    match protocol vrrp
    enable
  exit
  rule 12
    action permit
    match protocol tcp
    match destination-port object-group softgre_controller
    enable
  exit
  rule 13
    action permit
    match protocol tcp
    match destination-port object-group sync
    enable
  exit
  rule 20
    action permit
    match protocol icmp
    enable
  exit
  rule 30
    action permit
    match protocol udp
    match source-port object-group dhcp_client
    match destination-port object-group dhcp_server
    enable
  exit
  rule 40
    action permit
    match protocol udp
    match destination-port object-group ntp
    enable
  exit
  rule 50
    action permit
    match protocol tcp
    match destination-port object-group dns
    enable
  exit
  rule 60
    action permit
    match protocol udp
    match destination-port object-group dns
    enable
  exit
  rule 70
    action permit
    match protocol tcp
    match destination-port object-group netconf
    enable
  exit
  rule 80
    action permit
    match protocol tcp
    match destination-port object-group sa
    enable
  exit
  rule 90
    action permit
    match protocol udp
    match destination-port object-group radius_auth
    enable
  exit
  rule 100
    action permit
    match protocol gre
    enable
  exit
  rule 110
    action permit
    match protocol tcp
    match destination-port object-group airtune
    enable
  exit
exit
security zone-pair trusted trusted
  rule 1
    action permit
    enable
  exit
exit
security zone-pair trusted untrusted
  rule 1
    action permit
    enable
  exit
exit
security zone-pair untrusted self
  rule 1
    action permit
    match protocol udp
    match source-port object-group dhcp_server
    match destination-port object-group dhcp_client
    enable
  exit
exit
security zone-pair users self
  rule 10
    action permit
    match protocol icmp
    enable
  exit
  rule 11
    action permit
    match protocol vrrp
    enable
  exit
  rule 20
    action permit
    match protocol udp
    match source-port object-group dhcp_client
    match destination-port object-group dhcp_server
    enable
  exit
  rule 30
    action permit
    match protocol tcp
    match destination-port object-group dns
    enable
  exit
  rule 40
    action permit
    match protocol udp
    match destination-port object-group dns
    enable
  exit
exit
security zone-pair users untrusted
  rule 1
    action permit
    enable
  exit
exit

security passwords default-expired

nat source
  ruleset factory
    to zone untrusted
    rule 10
      description "replace 'source ip' by outgoing interface ip address"
      action source-nat interface
      enable
    exit
  exit
exit

ip dhcp-server
ip dhcp-server pool ap-pool
  network 192.168.1.0/24
  address-range 192.168.1.4-192.168.1.254
  default-router 192.168.1.1
  dns-server 192.168.1.1
  option 42 ip-address 192.168.1.1
  vendor-specific
    suboption 12 ascii-text "192.168.1.1"
    suboption 15 ascii-text "https://192.168.1.1:8043"
  exit
exit
ip dhcp-server pool users-pool
  network 192.168.2.0/24
  address-range 192.168.2.4-192.168.2.254
  default-router 192.168.2.1
  dns-server 192.168.2.1
exit
ip dhcp-server failover
  mode active-standby
  enable
exit

softgre-controller
  nas-ip-address 127.0.0.1
  failover
  data-tunnel configuration wlc
  aaa radius-profile default_radius
  keepalive-disable
  service-vlan add 3
  enable
exit

wlc
  outside-address 192.168.1.1
  service-activator
    aps join auto
  exit
  airtune
    enable
  exit
  failover
  ap-location default-location
    description default-location
    mode tunnel
    ap-profile default-ap
    ssid-profile default-ssid
  exit
  ssid-profile default-ssid
    description default-ssid
    ssid default-ssid
    radius-profile default-radius
    vlan-id 3
    security-mode WPA2_1X
    802.11kv
    band 2g
    band 5g
    enable
  exit
  ap-profile default-ap
    password ascii-text encrypted 8CB5107EA7005AFF
  exit
  radius-profile default-radius
    auth-address 192.168.1.1
    auth-password ascii-text encrypted 8CB5107EA7005AFF
    domain default
  exit
  ip-pool default-ip-pool
    description default-ip-pool
    ap-location default-location
  exit
  enable
exit

ip ssh server

ntp enable
ntp broadcast-client enable

crypto-sync
crypto-sync remote-delete

Пример настройки WLC-2

Подключаемся к WLC и переходим в режим  конфигурирования 

wlc# config

Меняем  имя устройства

hostname WLC-2

Создаем vlan 2449

vlan 2449
  force-up
exit

Настраиваем интерфейс gi 1/0/2, для приема тегированного  трафика в VLAN 3 и 2449

interface gigabitethernet 1/0/2
  mode switchport
  switchport mode trunk
  switchport trunk allowed vlan add 3,2449
exit

Создаем object-group для настройки  Firewall

object-group service sync
  port-range 873
exit
object-group service softgre_controller
  port-range 1337
exit

Меняем адресацию и настраиваем  VRRP на Bridge

no bridge 1
no bridge 3

bridge 1
  vlan 2449
  security-zone trusted
  ip address 192.168.1.3/24
  vrrp priority 110
  vrrp id 1
  vrrp ip 192.168.1.1/32
  vrrp group 1
  vrrp preempt disable
  vrrp timers garp refresh 60
  vrrp
  no spanning-tree
  enable
exit
bridge 3
  vlan 3
  mtu 1458
  security-zone users
  ip address 192.168.2.3/24
  vrrp priority 110
  vrrp id 3
  vrrp ip 192.168.2.1/32
  vrrp group 1
  vrrp preempt disable
  vrrp timers garp refresh 60
  vrrp
  no spanning-tree
  enable
exit

Указываем адресацию резервируемых контроллеров и назначаем им группу:

ip failover
  local-address 192.168.1.2
  remote-address 192.168.1.3
  vrrp-group 1
exit


Настраиваем Crypto-Sync  для синхронизации сертификатов

crypto-sync
crypto-sync remote-delete

Настраиваем Softgre-Controller для синхронизации туннелей SoftGRE

softgre-controller
  failover
exit

Настраиваем WLC для синхронизации точек доступа

wlc
  failover
exit


Настраиваем правила Firewall, разрешаем протокол VRRP и порты для синхронизации  туннелей и сертификатов

security zone-pair trusted self    
  rule 11
    action permit
    match protocol vrrp
    enable
  exit
  rule 12
    action permit
    match protocol tcp
    match destination-port softgre_controller
    enable
  exit  
  rule 13
    action permit
    match protocol tcp
    match destination-port sync
    enable
  exit
exit 
security zone-pair users self
  rule 11
    action permit
    match protocol vrrp
    enable
  exit
exit 

Настраиваем DHCP сервер

no ip dhcp-server pool users-pool
no ip dhcp-server pool ap-pool

ip dhcp-server pool ap-pool
  network 192.168.1.0/24
  address-range 192.168.1.4-192.168.1.254
  default-router 192.168.1.1
  dns-server 192.168.1.1
  option 42 ip-address 192.168.1.1
  vendor-specific
    suboption 12 ascii-text "192.168.1.1"
    suboption 15 ascii-text "https://192.168.1.1:8043"
  exit
exit 
ip dhcp-server pool users-pool
  network 192.168.2.0/24
  address-range 192.168.2.4-192.168.2.254
  default-router 192.168.2.1
  dns-server 192.168.2.1
exit

Настраиваем DHCP Failover

ip dhcp-server failover
  mode active-standby
  enable
exit


Создаем пользователя в локальном Radius сервере

radius-server local
  domain default
    user test
      password ascii-text 12345678
    exit
  exit
exit

Применяем и подтверждаем конфигурацию

wlc-2# commit 
wlc-2# confirm 

Полная конфигурация  WLC-2

 Конфигурация
#!/usr/bin/clish
#192
#1.19.1
#31/08/2023
#16:51:49
hostname WLC-2

object-group service airtune
port-range 8099
exit
object-group service dhcp_client
port-range 68
exit
object-group service dhcp_server
port-range 67
exit
object-group service dns
port-range 53
exit
object-group service netconf
port-range 830
exit
object-group service ntp
port-range 123
exit
object-group service radius_auth
port-range 1812
exit
object-group service sa
port-range 8043-8044
exit
object-group service ssh
port-range 22
exit
object-group service sync
port-range 873
exit
object-group service softgre_controller
port-range 1337
exit

syslog max-files 3
syslog file-size 512
syslog file tmpsys:syslog/default
severity info
exit

radius-server local
nas ap
key ascii-text encrypted 8CB5107EA7005AFF
network 192.168.1.0/24
exit
nas local
key ascii-text encrypted 8CB5107EA7005AFF
network 127.0.0.1/32
exit
domain default
user test
password ascii-text encrypted CDE65039E5591FA3
exit
exit
virtual-server default
enable
exit
enable
exit
username admin
password encrypted $6$gnFubZbxiPHa/WdA$xEmrfe/dVeVNDGBztQUB1Sk8In.20Hep/LxMJhxcHFWCfs2SPwxaCyyNxmzL3Bqu8buj71PPfp7WdfWz8AqrU/
exit
radius-server host 127.0.0.1
key ascii-text encrypted 8CB5107EA7005AFF
exit
aaa radius-profile default_radius
radius-server host 127.0.0.1
exit


boot host auto-config
boot host auto-update
vlan 3
force-up
exit
vlan 2449
force-up
exit
vlan 2
exit

no spanning-tree

domain lookup enable

security zone trusted
exit
security zone untrusted
exit
security zone users
exit

bridge 1
vlan 2449
security-zone trusted
ip address 192.168.1.3/24
vrrp id 1
vrrp ip 192.168.1.1/32
vrrp priority 110
vrrp group 1
vrrp preempt disable
vrrp timers garp refresh 60
vrrp
no spanning-tree
enable
exit
bridge 2
vlan 2
security-zone untrusted
ip address dhcp
no spanning-tree
enable
exit
bridge 3
vlan 3
mtu 1458
security-zone users
ip address 192.168.2.3/24
vrrp id 3
vrrp ip 192.168.2.1/32
vrrp priority 110
vrrp group 1
vrrp preempt disable
vrrp timers garp refresh 60
vrrp
no spanning-tree
enable
exit  interface gigabitethernet 1/0/1
  mode switchport
  switchport access vlan 2
exit
interface gigabitethernet 1/0/2
  mode switchport
  switchport mode trunk
  switchport trunk allowed vlan add 3,2449
exit
interface gigabitethernet 1/0/3
  mode switchport
exit
interface gigabitethernet 1/0/4
  mode switchport
exit
interface tengigabitethernet 1/0/1
  mode switchport
  switchport access vlan 2
exit
interface tengigabitethernet 1/0/2
  mode switchport
exit
tunnel softgre 1
  mode data
  local address 192.168.1.1
  default-profile
  enable
exit

security zone-pair trusted self
  rule 10
    action permit
    match protocol tcp
    match destination-port ssh
    enable
  exit
  rule 11
    action permit
    match protocol vrrp
    enable
  exit
  rule 12
    action permit
    match protocol tcp
    match destination-port softgre_controller
    enable
  exit
  rule 13
    action permit
    match protocol tcp
    match destination-port sync
    enable
  exit
  rule 20
    action permit
    match protocol icmp
    enable
  exit
  rule 30
    action permit
    match protocol udp
    match source-port dhcp_client
    match destination-port dhcp_server
    enable
  exit
  rule 40
    action permit
    match protocol udp
    match destination-port ntp
    enable
  exit
  rule 50
    action permit
    match protocol tcp
    match destination-port dns
    enable
  exit
  rule 60
    action permit
    match protocol udp
    match destination-port dns
    enable
  exit
  rule 70
    action permit
    match protocol tcp
    match destination-port netconf
    enable
  exit
  rule 80
    action permit
    match protocol tcp
    match destination-port sa
    enable
  exit
  rule 90
    action permit
    match protocol udp
    match destination-port radius_auth
    enable
  exit
  rule 100
    action permit
    match protocol gre
    enable
  exit
  rule 110
    action permit
    match protocol tcp
    match destination-port airtune
    enable
  exit
exit
security zone-pair trusted trusted
  rule 1
    action permit
    enable
  exit
exit
security zone-pair trusted untrusted
  rule 1
    action permit
    enable
  exit
exit
security zone-pair untrusted self
  rule 1
    action permit
    match protocol udp
    match source-port dhcp_server
    match destination-port dhcp_client
    enable
  exit
exit
security zone-pair users self
  rule 10
    action permit
    match protocol icmp
    enable
  exit
  rule 11
    action permit
    match protocol vrrp
    enable
  exit
  rule 20
    action permit
    match protocol udp
    match source-port dhcp_client
    match destination-port dhcp_server
    enable
  exit
  rule 30
    action permit
    match protocol tcp
    match destination-port dns
    enable
  exit
  rule 40
    action permit
    match protocol udp
    match destination-port dns
    enable
  exit
exit
security zone-pair users untrusted
  rule 1
    action permit
    enable
  exit
exit

security passwords default-expired
nat source
  ruleset factory
    to zone untrusted
    rule 10
      description "replace 'source ip' by outgoing interface ip address"
      action source-nat interface
      enable
    exit
  exit
exit

ip failover
  local-address 192.168.1.2
  remote-address 192.168.1.3
  vrrp-group 1
exit

ip dhcp-server
ip dhcp-server pool ap-pool
  network 192.168.1.0/24
  address-range 192.168.1.4-192.168.1.254
  default-router 192.168.1.1
  dns-server 192.168.1.1
  option 42 ip-address 192.168.1.1
  vendor-specific
    suboption 12 ascii-text "192.168.1.1"
    suboption 15 ascii-text "https://192.168.1.1:8043"
  exit
exit
ip dhcp-server pool users-pool
  network 192.168.2.0/24
  address-range 192.168.2.4-192.168.2.254
  default-router 192.168.2.1
  dns-server 192.168.2.1
exit

ip dhcp-server failover
  mode active-standby
  enable
exit

softgre-controller
  nas-ip-address 127.0.0.1
  failover
  data-tunnel configuration wlc
  aaa radius-profile default_radius
  keepalive-disable
  service-vlan add 3
  enable
exit

wlc
  outside-address 192.168.1.1
  service-activator
    aps join auto
  exit
  airtune
    enable
  exit
  failover
  ap-location default-location
    description default-location
    mode tunnel
    ap-profile default-ap
    ssid-profile default-ssid
  exit
  ssid-profile default-ssid
    description default-ssid
    ssid default-ssid
    radius-profile default-radius
    vlan-id 3
    security-mode WPA2_1X
    802.11kv
    band 2g
    band 5g
    enable
  exit
  ap-profile default-ap
    password ascii-text encrypted 8CB5107EA7005AFF
  exit
  radius-profile default-radius
    auth-address 192.168.1.1
    auth-password ascii-text encrypted 8CB5107EA7005AFF
    domain default
  exit
  ip-pool default-ip-pool
    description default-ip-pool
    ap-location default-location
  exit
  enable
exit

ip ssh server

ntp enable
ntp broadcast-client enable  

crypto-sync
crypto-sync remote-delete 


Проверка

Для проверки синхронизации туннелей, WLC, DHCP можно посмотреть вывод:

WLC-1# show high-availability state 
VRRP role:                         Master
AP Tunnels:
    State:                         Successful synchronization
    Last synchronization:          06:18:03 25.09.2023
DHCP option 82 table:
    State:                         Disabled
    Last state change:             --
DHCP server:
VRF:                               --
    State:                         Successful synchronization
crypto-sync:
    State:                         Successful synchronization
    Last synchronization:          06:18:03 25.09.2023
Firewall:
    State:                         Disabled
    Last state change:             --
WLC:
    State:                         Successful synchronization
	Last synchronization:          06:18:03 25.09.2023


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