git: a88e73dd35 - main - Add routing work description

[Alexander V. Chernikov]

The branch main has been updated by melifaro (src committer):

URL: https://cgit.FreeBSD.org/doc/commit/?id=a88e73dd3566928bbb0c4fd99fad30aa5f725b66

commit a88e73dd3566928bbb0c4fd99fad30aa5f725b66
Author:     Alexander V. Chernikov <melifaro at FreeBSD.org>
AuthorDate: 2021-04-10 00:33:50 +0000
Commit:     Alexander V. Chernikov <melifaro at FreeBSD.org>
CommitDate: 2021-04-10 00:33:50 +0000

    Add routing work description
    
    Differential Revision: https://reviews.freebsd.org/D29275
    Approved by:    debdrup
---
 website/content/en/releases/13.0R/relnotes.adoc | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/website/content/en/releases/13.0R/relnotes.adoc b/website/content/en/releases/13.0R/relnotes.adoc
index 30d996a403..48707f03ca 100644
--- a/website/content/en/releases/13.0R/relnotes.adoc
+++ b/website/content/en/releases/13.0R/relnotes.adoc
@@ -457,6 +457,9 @@ can be set to  `1` to enable strictly packet conserving behavior (at most 1 segm
 
 The man:cc_cubic[4] man:tcp[4] congestion control algorithm aligns more closely with the standard in RFC8312. gitref:40f9078ff9d9[repository=src] {{< sponsored "NetApp" >}}
 
+The amount of queued packets in for unresolved ARP/NDP entries has been increased to 16. gitref:0da3f8c98d17d9[repository=src]
+Stacked VLAN (802.1ad) support has been added. gitref:c7cffd65c5d8[repository=src].
+
 The man:ping[8] utility now supports setting network QoS, with IP DSCP gitref:6034024daddb[repository=src] and Ethernet PCP gitref:81a6f4c7ae69[repository=src]. {{< sponsored "NetApp" >}}
 
 Merged the man:ping[8] and man:ping6[8] utilities.
@@ -467,6 +470,25 @@ SCTP support is now available as a new [.filename]#sctp.ko# kernel module
 and is no longer compiled into GENERIC by default.
 gitref:e64080e79c53[repository=src] {{< sponsored "The FreeBSD Foundation" >}}
 
+[[[network-routing]]
+=== Routing
+FreeBSD 13 features a rewritten routing stack. It is based on the introduction of nexthops - objects holding all necessary state to pass a packet to the desired destination. gitref:a666325282ea[repository=src]
+Multipath routing support has been rewritten in more scalable fashion, featuring 64-wide multipath routes with O(1) lookup time. gitref:fedeb08b6a58[repository=src].
+The `RADIX_MPATH` kernel option got replaced with `ROUTE_MPATH`, which is turned on by default. Additionally, the `net.route.multipath` sysctl has been added to control the feature in runtime. gitref:d1d941c5b910[repository=src], gitref:d5fe384b4d41[repository=src]
+Support for custom route lookup algorithms has been added. The framework decouples control-plane and data-plane, resulting in both faster lookups and better convergence times for large tables under load. gitref:f5baf8bb12f3[repository=src]
+DPDK librte-based IPv4/IPv6 route lookup algorithms has been added, optimising control-plane and data-plane for large routing tables. gitref:537d13437314[repository=src]
+
+Interface fib is now used for proxyarp checks. gitref:66bc03d41566[repository=src]
+Loopback route installation has been fixed for the interfaces in different fibs using the same prefix. gitref:9fdbf7eef5c0[repository=src]
+Number of fibs can now be changed at runtime by controlling `net.fibs` sysctl. gitref:f5247a232a33[repository=src]
+`net.add_addr_allfibs` sysctl default has been changed to 0. gitref:2d3982419593[repository=src]
+
+Temporal routes (routes with `-expire` time set) expiration have been for both IPv4 and IPv6. gitref:34a5582c47c7[repository=src]
+Duplicate routes installation issue for /32 or /128 interface aliases has been fixed. gitref:81728a538d24[repository=src]
+IPv6 interface routes are now marked with RTF_PINNED like their IPv4 counterparts. gitref:81728a538d24[repository=src]
+The {{< manpage "route" "8">}} network auto-guessing has been eliminated by removing remnants of classful behavior. gitref:d28210b2c2aa[repository=src]
+Sysctl `net.inet6.ip6.deembed_scopeid` , making it possible to disable IPv6 scope de-embedding, has been removed. gitref:bec053ffe01d[repository=src]
+
 [[hardware]]
 == Hardware Support