ckishimo [Mon, 31 Jan 2022 22:58:14 +0000 (23:58 +0100)]
ospfd: restart spf when distance is updated
if r1 has a route received from a neighbor with the default administrative
distance configured
r1# sh ip route
Codes: K - kernel route, C - connected, S - static, R - RIP,
O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
f - OpenFabric,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure
O>* 1.1.1.1/32 [110/20] via 10.0.12.2, r1-r2-eth0, weight 1, 00:00:41
this is not applied as there are no changes in the routing table
r1# sh ip route
Codes: K - kernel route, C - connected, S - static, R - RIP,
O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
f - OpenFabric,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure
O>* 1.1.1.1/32 [110/20] via 10.0.12.2, r1-r2-eth0, weight 1, 00:00:13
This commit will force the update of the routing table with the new configured distance
r1# sh ip route
Codes: K - kernel route, C - connected, S - static, R - RIP,
O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
f - OpenFabric,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure
O>* 1.1.1.1/32 [50/20] via 10.0.12.2, r1-r2-eth0, weight 1, 00:00:14
Donald Sharp [Mon, 31 Jan 2022 17:49:55 +0000 (12:49 -0500)]
ospfd: Convert output to host order from network order for route_tag
FRR stores the route_tag in network byte order. Bug filed indicates
that the `show ip ospf route` command shows the correct value.
Every place route_tag is dumped in ospf_vty.c the ntohl function
is used first.
Fixes: #10450 Signed-off-by: Donald Sharp <sharpd@nvidia.com>
ckishimo [Wed, 26 Jan 2022 21:41:36 +0000 (22:41 +0100)]
ospf6d: restart spf when distance is updated
if r1 has a route received from a neighbor and the same route
configured as static, the administrative distance will determine
which route to use
r1(config)# ipv6 route 1:1::1/128 Null0 70
r1# sh ipv6 route
Codes: K - kernel route, C - connected, S - static, R - RIPng,
O - OSPFv3, I - IS-IS, B - BGP, N - NHRP, T - Table,
v - VNC, V - VNC-Direct, A - Babel, F - PBR,
f - OpenFabric,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure
S>* 1:1::1/128 [70/0] unreachable (blackhole), weight 1, 00:00:12
O 1:1::1/128 [110/20] via fe80::1833:c9ff:fe7b:3e43, r1-r2-eth0, weight 1, 00:00:49
The static route is selected. If we now change the administrative distance
in ospf6, the OSPF route should be selected
r1# sh ipv6 route
Codes: K - kernel route, C - connected, S - static, R - RIPng,
O - OSPFv3, I - IS-IS, B - BGP, N - NHRP, T - Table,
v - VNC, V - VNC-Direct, A - Babel, F - PBR,
f - OpenFabric,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure
S>* 1:1::1/128 [70/0] unreachable (blackhole), weight 1, 00:00:39
O 1:1::1/128 [110/20] via fe80::1833:c9ff:fe7b:3e43, r1-r2-eth0, weight 1, 00:01:16
However the distance is not applied as there are no changes in the routing table
This commit will force the update of the routing table with the new configured distance
r1# sh ipv6 route
Codes: K - kernel route, C - connected, S - static, R - RIPng,
O - OSPFv3, I - IS-IS, B - BGP, N - NHRP, T - Table,
v - VNC, V - VNC-Direct, A - Babel, F - PBR,
f - OpenFabric,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure
O>* 1:1::1/128 [50/20] via fe80::8cb7:e6ff:fef5:2344, r1-r2-eth0, weight 1, 00:00:03
S 1:1::1/128 [70/0] unreachable (blackhole), weight 1, 00:00:19
Igor Ryzhov [Thu, 27 Jan 2022 18:05:40 +0000 (21:05 +0300)]
vrrpd: use ipaddr_is_zero when needed
Replace custom implementation or call to ipaddr_isset with a call to
ipaddr_is_zero.
ipaddr_isset is not fully correct, because it's fine to have some
non-zero bytes at the end of the struct in case of IPv4 and the function
doesn't allow that.
Donald Sharp [Mon, 24 Jan 2022 20:37:54 +0000 (15:37 -0500)]
zebra: Don't double delete the table we are cleaning up
vrf_disable is always called first before
vrf_delete. The rnh_table and rnh_table_multicast tables
are already deleted as part of vrf_disable. No need
to do it again.
ckishimo [Tue, 25 Jan 2022 17:49:27 +0000 (18:49 +0100)]
ospf6d: show if area is NSSA
This PR will include if the area is NSSA in the output of "show ipv6 ospf"
r2# show ipv6 ospf
...
Area 0.0.0.0
Number of Area scoped LSAs is 8
Interface attached to this area: r2-eth1
SPF last executed 20.46717s ago
Area 0.0.0.1[Stub]
Number of Area scoped LSAs is 9
Interface attached to this area: r2-eth0
SPF last executed 20.46911s ago
Area 0.0.0.2[NSSA]
Number of Area scoped LSAs is 14
Interface attached to this area: r2-eth2
SPF last executed 20.46801s ago
Trey Aspelund [Tue, 16 Nov 2021 21:11:26 +0000 (21:11 +0000)]
bgpd: retain peer asn even with remove-private-AS
In situations where remove-private-AS is configured for eBGP peers
residing in a private ASN, the peer's ASN was not being retained
in the AS-Path which can allow loops to occur. This was addressed
in a prior commit but it only addressed cases where the "replace-AS"
keyword was configured.
This commit ensures we retain the peer's ASN when using
"remove-private-AS" for eBGP peers in a private ASN regardless of other
keywords.
Before ("remote-private-AS" only):
=========
ub18# show ip bgp neighbors enp6s0 advertised-routes | include 100.64.0.2
*> 100.64.0.2/32 :: 0 i <<<<< empty as-path, no way to prevent loop
After ("remote-private-AS" only):
=========
ub18# show ip bgp neighbors enp6s0 advertised-routes | include 100.64.0.2
*> 100.64.0.2/32 :: 0 42000000014200000001 i <<<< retain peer's asn, breaks loop
Igor Ryzhov [Sun, 23 Jan 2022 13:08:46 +0000 (16:08 +0300)]
*: do not send opaque data to zebra by default
Opaque data takes up a lot of memory when there are a lot of routes on
the box. Given that this is just a cosmetic info, I propose to disable
it by default to not shock people who start using FRR for the first time
or upgrades from an old version.
Quentin Young [Thu, 20 Jan 2022 22:24:30 +0000 (17:24 -0500)]
pimd: fix misuse of xpath buf size constants
XPATH_MAXLEN denotes the maximum length of an XPATH. It does not make
sense to allocate a buffer intended to contain an XPATH with a size
larger than the maximum allowable size of an XPATH. Consequently this PR
removes buffers that do this. Prints into these buffers are now checked
for overflow.
Donatas Abraitis [Fri, 21 Jan 2022 21:31:58 +0000 (23:31 +0200)]
bgpd: Show negative form of capability extended-nexthop for interface peers
```
exit1-debian-11(config-router)# neighbor 192.168.100.3 remote-as external
exit1-debian-11(config-router)# do sh run | include extended
exit1-debian-11(config-router)# neighbor 192.168.100.3 capability extended-nexthop
exit1-debian-11(config-router)# do sh run | include extended
neighbor 192.168.100.3 capability extended-nexthop
exit1-debian-11(config-router)# no neighbor 192.168.100.3 capability extended-nexthop
exit1-debian-11(config-router)# do sh run | include extended
exit1-debian-11(config-router)# neighbor eth0 interface remote-as external
exit1-debian-11(config-router)# do sh run | include extended
exit1-debian-11(config-router)# neighbor eth0 capability extended-nexthop
exit1-debian-11(config-router)# do sh run | include extended
exit1-debian-11(config-router)# no neighbor eth0 capability extended-nexthop
exit1-debian-11(config-router)# do sh run | include extended
no neighbor eth0 capability extended-nexthop
exit1-debian-11(config-router)#
```
Louis Scalbert [Wed, 20 Oct 2021 14:26:30 +0000 (16:26 +0200)]
bgpd: apply maximum-prefix-out without clearing the neighbor
Abstract:
- The command "neighbor PEER maximum-prefix-out NUMBER" cannot be applied
without clearing the BGP neighbor.
- Apply the maximum-prefix-out value as soon as it is modified without
clearing the neighbor.
subgroup_update_packet() and subgroup_withdraw_packet() respectively
manages the announcement and withdrawal BGP message to the peer.
subgrp->scount counter counts the number of sent prefixes.
Before the patch, the maximum out prefix limitation was applied in
subgroup_update_packet() in order that subgrp->scount never exceeds the
limit. Setting a limit inferior to the effective number of sent prefix
did not result in sending any withdrawal message to reduce the number of
sent prefixes. Without clearing the BGP neighbor, the limitation only
applied to the announcement of new prefixes when the limitation was
over.
With the patch, the limitation is checked in subgroup_announce_check().
The function is intended to say whether a prefix has to be announced in
regards to the prefix-list, route-map... Now when a maximum-prefix-out
value is changed/removed, the neighbor AFI/SAFI table is re-parsed in
the same way as for the application of route-map, prefix-lists...
Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
Donald Sharp [Wed, 3 Feb 2021 14:13:59 +0000 (09:13 -0500)]
lib: Figure out if we are being starved for cpu
If a thread timer should have popped CPU_CONSUMED_CHECK
seconds in the past, and we are only handling it now. Consider
the thread starved and notice it.
Martin Buck [Mon, 17 Jan 2022 12:54:02 +0000 (13:54 +0100)]
ospf6d: Fix ECMP inter-area route nexthop update
Fixes #9720. When updating an ECMP inter-area route, we compute
a new route and check whether that already exists. If so, we keep the old
route and only update its nexthops. Previously, we merged the new route's
nexthops into the old one's, but this way, it's impossible to remove
nexthops from the old route, resulting in stale nexthops.
This commit fixes this by first removing all nexthops from the old route and
then copying all nexthops from the new route into it. If the new route has
fewer nexthops, the old one will have as well afterwards.
Signed-off-by: Martin Buck <mb-tmp-tvguho.pbz@gromit.dyndns.org>
Igor Ryzhov [Wed, 19 Jan 2022 20:02:11 +0000 (23:02 +0300)]
bgpd: fix populating the attribute
This code is populating a temporary variable `add` instead of the attr.
Initially this variable was later copied to the attr but the copying was
erroneously deleted by 0a50c2481. Directly populate the attr to restore
the correct behavior.
Igor Ryzhov [Wed, 19 Jan 2022 19:55:44 +0000 (22:55 +0300)]
bgpd: remove wrong overlay index comparison
Here we try to compare the new attr with the existing one but this call
compares the existing index with zero instead. attrhash_cmp already
compares indexes using overlay_index_same so this call is both wrong and
useless.
Donatas Abraitis [Wed, 19 Jan 2022 17:02:01 +0000 (19:02 +0200)]
bgpd: Show Graceful Restart seconds remaining per prefix
```
exit1-debian-11# sh ip bgp 10.10.10.10/32
BGP routing table entry for 10.10.10.10/32, version 14
Paths: (1 available, best #1, table default)
Not advertised to any peer
65000, (stale)
192.168.0.2 from 192.168.0.2 (0.0.0.0)
Origin incomplete, metric 0, valid, external, best (First path received)
Last update: Wed Jan 19 17:13:51 2022
Time until Graceful Restart stale route deleted: 117
```
```
~# vtysh -c 'show bgp ipv4 unicast 100.100.100.100/32'
BGP routing table entry for 100.100.100.100/32, version 7
Paths: (2 available, best #2, table default)
Advertised to non peer-group peers:
home-spine1.donatas.net(192.168.0.2)
65002, (stale)
192.168.10.17 from donatas-pc(192.168.10.17) (0.0.0.0)
Origin incomplete, valid, external
Last update: Sat Jan 15 21:45:47 2022
65001
192.168.0.2 from home-spine1.donatas.net(192.168.0.2) (2.2.2.2)
Origin incomplete, metric 0, valid, external, best (Older Path)
Last update: Sat Jan 15 21:25:19 2022
```
~# vtysh -c 'show bgp ipv4 unicast 100.100.100.100/32'
BGP routing table entry for 100.100.100.100/32, version 7
Paths: (2 available, best #2, table default)
Advertised to non peer-group peers:
home-spine1.donatas.net(192.168.0.2)
65002, (stale)
192.168.10.17 from donatas-pc(192.168.10.17) (0.0.0.0)
Origin incomplete, valid, external
Community: llgr-stale
Last update: Sat Jan 15 21:49:01 2022
Time until Long-lived stale route deleted: 16
65001
192.168.0.2 from home-spine1.donatas.net(192.168.0.2) (2.2.2.2)
Origin incomplete, metric 0, valid, external, best (First path received)
Last update: Sat Jan 15 21:25:19 2022
```
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