proxmox-mirrors/mirror_frr
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_frr synced 2025-05-29 15:07:51 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

doc: add vrrp interoperability help and command

Browse Source 
Add VRRPv3 `checksum-with-ipv4-pseudoheader` command and
interoperability help text.

Signed-off-by: Siger Yang <siger.yang@outlook.com>
This commit is contained in:
Siger Yang 2022-11-29 03:59:23 +08:00
parent 9f2379bdd2
commit 7ef70ad5d4
No known key found for this signature in database
GPG Key ID: 25F5E75AF97D5067
1 changed files with 22 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
doc/user/vrrp.rst
View File

@ -393,6 +393,11 @@ All interface configuration commands are documented below.
higher priority to take over Master status from the existing Master. Enabled higher priority to take over Master status from the existing Master. Enabled
by default. by default.
.. clicmd:: vrrp (1-255) checksum-with-ipv4-pseudoheader
Specify whether VRRPv3 checksum should involve IPv4 pseudoheader. This
command should not affect VRRPv2 and IPv6. Enabled by default.
.. clicmd:: vrrp (1-255) priority (1-254) .. clicmd:: vrrp (1-255) priority (1-254)
Set the router priority. The router with the highest priority is elected as Set the router priority. The router with the highest priority is elected as
@ -448,7 +453,7 @@ Show commands, global defaults and debugging configuration commands.
zebra zebra
Logs communications with Zebra. Logs communications with Zebra.
.. clicmd:: vrrp default <advertisement-interval (1-4096)|preempt|priority (1-254)|shutdown> .. clicmd:: vrrp default <advertisement-interval (1-4096)|preempt|priority (1-254)|checksum-with-ipv4-pseudoheader|shutdown>
Configure defaults for new VRRP routers. These values will not affect Configure defaults for new VRRP routers. These values will not affect
already configured VRRP routers, but will be applied to newly configured already configured VRRP routers, but will be applied to newly configured
@ -550,3 +555,19 @@ feature instead, explained `here
<https://www.virtuallyghetto.com/2018/04/native-mac-learning-in-vsphere-6-7-removes-the-need-for-promiscuous-mode-for-nested-esxi.html>`_. <https://www.virtuallyghetto.com/2018/04/native-mac-learning-in-vsphere-6-7-removes-the-need-for-promiscuous-mode-for-nested-esxi.html>`_.
Issue reference: https://github.com/FRRouting/frr/issues/5386 Issue reference: https://github.com/FRRouting/frr/issues/5386
My router cannot interoperate with branded routers / L3 switches
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FRR includes a pseudoheader when calculating VRRPv3 checksums by default,
regardless of whether it's IPv4 or IPv6.
Some vendors have different interpretations of `VRRPv3 RFC 5798 #5.2.8
<https://www.rfc-editor.org/rfc/rfc5798.html#section-5.2.8>`_. In such cases,
their checksums are calculated with a pseudoheader only when it comes to IPv6.
You need to disable ``checksum-with-ipv4-pseudoheader`` so that FRR computes and
accepts such checksums.
Issue reference: https://github.com/FRRouting/frr/issues/9951