diff options
Diffstat (limited to 'docs/high-availability.rst')
| -rw-r--r-- | docs/high-availability.rst | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/docs/high-availability.rst b/docs/high-availability.rst index c967d647..54f2f388 100644 --- a/docs/high-availability.rst +++ b/docs/high-availability.rst @@ -7,7 +7,7 @@ VRRP (Virtual Redundancy Protocol) provides active/backup redundancy for routers Every VRRP router has a physical IP/IPv6 address, and a virtual address. On startup, routers elect the master, and the router with the highest priority becomes the master and assigns the virtual address to its interface. All routers with lower priorities become backup routers. The master then starts sending keepalive packets to notify other routers that it's available. -If the master fails and stops sending keepalive packets, router with the next highest priority becomes the new master and takes over the virtual address. +If the master fails and stops sending keepalive packets, the router with the next highest priority becomes the new master and takes over the virtual address. VRRP keepalive packets use multicast, and VRRP setups are limited to a single datalink layer segment. You can setup multiple VRRP groups (also called virtual routers). Virtual routers are identified by a VRID (Virtual Router IDentifier). @@ -19,7 +19,7 @@ Basic setup VRRP groups are created with the ``set high-availability vrrp group $GROUP_NAME`` commands. The required parameters are interface, vrid, and virtual-address. -mininmal config +minimal config .. code-block:: sh @@ -61,12 +61,12 @@ VRRP priority can be set with ``priority`` option: set high-availability vrrp group Foo priority 200 -The priority must be an interger number from 1 to 255. Higher priority value increases router's precedence in the master elections. +The priority must be an integer number from 1 to 255. Higher priority value increases router's precedence in the master elections. Preemption ---------- -VRRP can use two modes: preemptive and non-preemptive. In the preemptive mode, if a router with a higher priority fails and then comes back, routers with lower priority will give up their master status. In non-preemptive mode, the newly elected master will keep the master status and the virtual address indenfinitely. +VRRP can use two modes: preemptive and non-preemptive. In the preemptive mode, if a router with a higher priority fails and then comes back, routers with lower priority will give up their master status. In non-preemptive mode, the newly elected master will keep the master status and the virtual address indefinitely. By default VRRP uses preemption. You can disable it with the "no-preempt" option: @@ -117,4 +117,4 @@ This setup will make the VRRP process execute the ``/config/scripts/vrrp-fail.sh set high-availability vrrp group Foo transition-script backup "/config/scripts/vrrp-fail.sh Foo" set high-availability vrrp group Foo transition-script fault "/config/scripts/vrrp-fail.sh Foo" - set high-availability vrrp group Foo transition-script master "/config/scripts/vrrp-master.sh Foo"
\ No newline at end of file + set high-availability vrrp group Foo transition-script master "/config/scripts/vrrp-master.sh Foo" |