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doc: remove obsolete Netlink discussion, fix svi cmd doc

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Signed-off-by: Jafar Al-Gharaibeh <jafar@atcorp.com>
This commit is contained in:
Jafar Al-Gharaibeh 2021-04-30 18:08:34 -05:00
parent 1af1ce4ebc
commit a927f5bc6e
2 changed files with 11 additions and 17 deletions
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8
doc/user/bgp.rst
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@ -2634,15 +2634,15 @@ the same behavior of using same next-hop and RMAC values.
Enables or disables advertise-pip feature, specifiy system-IP and/or system-MAC Enables or disables advertise-pip feature, specifiy system-IP and/or system-MAC
parameters. parameters.
EVPN advertise-svi EVPN advertise-svi-ip
^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^
Typically, the SVI IP address is reused on VTEPs across multiple racks. However, Typically, the SVI IP address is reused on VTEPs across multiple racks. However,
if you have unique SVI IP addresses want those to be reachable you can enable the if you have unique SVI IP addresses that you want to be reachable you can use the
advertise-svi-ip option. This option advertises the SVI IP/MAC address as a type-2 advertise-svi-ip option. This option advertises the SVI IP/MAC address as a type-2
route and eliminates the need for any flooding over VXLAN to reach the IP from a route and eliminates the need for any flooding over VXLAN to reach the IP from a
remote VTEP. remote VTEP.
.. clicmd:: advertise-svi .. clicmd:: advertise-svi-ip
Note that you should not enable both the advertise-svi-ip and the advertise-default-gw Note that you should not enable both the advertise-svi-ip and the advertise-default-gw
at the same time. at the same time.

20
doc/user/kernel.rst
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@ -6,6 +6,9 @@ Kernel Interface
There are several different methods for reading kernel routing table There are several different methods for reading kernel routing table
information, updating kernel routing tables, and for looking up interfaces. information, updating kernel routing tables, and for looking up interfaces.
FRR relies heavily on the Netlink (``man 7 netlink``) interface to
communicate with the Kernel. However, other interfaces are still used
in some parts of the code.
- ioctl - ioctl
This method is a very traditional way for reading or writing kernel This method is a very traditional way for reading or writing kernel
@ -27,16 +30,7 @@ information, updating kernel routing tables, and for looking up interfaces.
kernel information. kernel information.
- routing socket / Netlink - routing socket / Netlink
On recent Linux kernels (2.0.x and 2.2.x), there is a kernel/user Netlink first appeard in Linux kernel 2.0. It makes asynchronous
communication support called `Netlink`. It makes asynchronous communication communication between the kernel and FRR possible, similar to a routing
between kernel and FRR possible, similar to a routing socket on BSD systems. socket on BSD systems. Netlink communication is done by reading/writing
over Netlink socket.
Before you use this feature, be sure to select (in kernel configuration) the
kernel/Netlink support option 'Kernel/User network link driver' and 'Routing
messages'.
Today, the :file:`/dev/route` special device file is obsolete. Netlink
communication is done by reading/writing over Netlink socket.
After the kernel configuration, please reconfigure and rebuild FRR. You can
use Netlink as a dynamic routing update channel between FRR and the kernel.