In practical terms, unplanned GR refers to the act of recovering
from a software crash without affecting the forwarding plane.
Unplanned GR and Planned GR work virtually the same, except for the
following difference: on planned GR, the router sends the Grace-LSAs
*before* restarting, whereas in unplanned GR the router sends the
Grace-LSAs immediately *after* restarting.
For unplanned GR to work, ospf6d was modified to send a
ZEBRA_CLIENT_GR_CAPABILITIES message to zebra as soon as GR is
enabled. This causes zebra to freeze the OSPF routes in the RIB as
soon as the ospf6d daemon dies, for as long as the configured grace
period (the defaults is 120 seconds). Similarly, ospf6d now stores in
non-volatile memory that GR is enabled as soon as GR is configured.
Those two things are no longer done during the GR preparation phase,
which only happens for planned GRs.
Unplanned GR will only take effect when the daemon is killed
abruptly (e.g. SIGSEGV, SIGKILL), otherwise all OSPF routes will be
uninstalled while ospf6d is exiting. Once ospf6d starts, it will
check whether GR is enabled and enter in the GR mode if necessary,
sending Grace-LSAs out all operational interfaces.
One disadvantage of unplanned GR is that the neighboring routers
might time out their corresponding adjacencies if ospf6d takes too
long to come back up. This is especially the case when short dead
intervals are used (or BFD). For this and other reasons, planned
GR should be preferred whenever possible.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
Effectively a massive search and replace of
`struct thread` to `struct event`. Using the
term `thread` gives people the thought that
this event system is a pthread when it is not
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Problem Statement:
==================
RFC 7166 support for OSPF6 in FRR code.
RCA:
====
This feature is newly supported in FRR
Fix:
====
Core functionality implemented in previous commit is
stitched with rest of ospf6 code as part of this commit.
Risk:
=====
Low risk
Tests Executed:
===============
Have executed the combination of commands.
Signed-off-by: Abhinay Ramesh <rabhinay@vmware.com>
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(config)# router ospf6
r1(config-ospf6)# distance 50
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
Signed-off-by: ckishimo <carles.kishimoto@gmail.com>
Update ospfd and ospf6d to send opaque route attributes to
zebra. Those attributes are stored in the RIB and can be viewed
using the "show ip[v6] route" commands (other than that, they are
completely ignored by zebra).
Example:
```
debian# show ip route 192.168.1.0/24
Routing entry for 192.168.1.0/24
Known via "ospf", distance 110, metric 20, best
Last update 01:57:08 ago
* 10.0.1.2, via eth-rt2, weight 1
OSPF path type : External-2
OSPF tag : 0
debian#
debian# show ip route 192.168.1.0/24 json
{
"192.168.1.0\/24":[
{
"prefix":"192.168.1.0\/24",
"prefixLen":24,
"protocol":"ospf",
"vrfId":0,
"vrfName":"default",
"selected":true,
[snip]
"ospfPathType":"External-2",
"ospfTag":"0"
}
]
}
```
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
The external_id_table was only ever used to store pointers to data
and was never used for lookup during the course of normal operations.
However it did lead to crashes because somewhere along the way
external routes stored in the external_table never had their
id associated into the external_id_table and we would assert
on the node lookup failing.
Since this code was never used for anything other than
storing data and it was never retrieved for anything useful
let's just remove it from ospf6d.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Add the "default-information-originate" option to the "area X nssa"
command. That option allows the origination of Type-7 default routes
on NSSA ABRs and ASBRs.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
ospf6_router_id_update function is used by ospf6_router_id_update_zebra
to update the running the ospf6 router-id.
This patches makes the functions to (un)configure ospf6 router-id use
the same function as ospf6_router_id_update_zebra.
Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
When a router-id change is notified by zebra to ospf6d, we only take
into account the change if no adjacencies are in Full state.
Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
RFC 5187 specifies the Graceful Restart enhancement to the OSPFv3
routing protocol. This commit implements support for the GR
restarting mode.
Here's a quick summary of how the GR restarting mode works:
* GR can be enabled on a per-instance basis using the `graceful-restart
[grace-period (1-1800)]` command;
* To perform a graceful shutdown, the `graceful-restart prepare ipv6
ospf` EXEC-level command needs to be issued before restarting the
ospf6d daemon (there's no specific requirement on how the daemon
should be restarted);
* `graceful-restart prepare ospf` will initiate the graceful restart
for all GR-enabled instances by taking the following actions:
o Flooding Grace-LSAs over all interfaces
o Freezing the OSPF routes in the RIB
o Saving the end of the grace period in non-volatile memory (a JSON
file stored in `$frr_statedir`)
* Once ospf6d is started again, it will follow the procedures
described in RFC 3623 until it detects it's time to exit the graceful
restart (either successfully or unsuccessfully).
Testing done:
* New topotest featuring a multi-area OSPF topology (including stub
and NSSA areas);
* Successful interop tests against IOS-XR routers acting as helpers.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
Feature Implementation.
========================
This feature will help in advertising the External LSAs with aggregation.
The commands allow us to tune the advertisement with different parameters
as mentioned in the CLI List below.
It can also help in case we do not want to advertise any prefix with the
no-advertise option.
New CLIs added:
===============
summary-address X:X::X:X/M$prefix [tag (1-4294967295)] [{metric (0-16777215) | metric-type (1-2)}]
no summary-address X:X::X:X/M$prefix [tag (1-4294967295)] [{metric (0-16777215) | metric-type (1-2)}]
summary-address X:X::X:X/M$prefix no-advertise
no summary-address X:X::X:X/M$prefix no-advertise
aggregation timer (5-1800)
no aggregation timer (5-1800)
show ipv6 ospf6 summary-address [detail$detail] [json]
debug ospf6 lsa aggregation
CAT RUN:
========
QE to add test scripts
Signed-Off-by: Mobashshera Rasool <mrassol@vmware.com>
ospf6_router_id_update function is used by ospf6_router_id_update_zebra
to update the running the ospf6 router-id.
This patches makes the functions to (un)configure ospf6 router-id use
the same function as ospf6_router_id_update_zebra.
Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
---
When a router-id change is notified by zebra to ospf6d, we only take
into account the change if no adjacencies are in Full state.
Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
Problem Statement:
==================
when route-map config is changed from permit to deny, it is not getting
applied to both connected and static and vice versa
RCA:
==================
When route-map changes from permit to deny or vice versa, a notification is
sent to ospf6 daemon via ospf6_asbr_routemap_update. In this function, a thread
is scheduled after 5 seconds to apply the route-map changes. In this thread
(ospf6_asbr_routemap_update_timer), only the first type is passed as argument
and only the first type i.e "connected" is passed and hence in callback only
on this type of route route-map gets applied.
Fix:
====
Need to loop through all the route-types in the call back and process
the route-map changes. Added a flag to mark which all route-types needs
to be processed.
Test Executed:
===============
1. Change route-map from permit to deny.
2. Change route-map from deny to permit.
3. Add new route and checked.
4. Verified summarised routes.
Risk:
============
Low
Signed-off-by: Mobashshera Rasool <mrasool@vmware.com>
Adding the "clear ipv6 ospf6 command" . It resets
the ospfv3 datastructures and clears the database
as well as route tables. It resets the neighborship
by restarting the interface state machine.
If the user wants to change the router-id, this
command updates the router-id to the latest static
router-id and starts the neighbor formation with
the new router-id.
Signed-off-by: Yash Ranjan <ranjany@vmware.com>
allow amount of work done by read and write threads in a single
invocation to be tuned to between 1 and 100 packets (default 20)
Signed-off-by: Pat Ruddy <pat@voltanet.io>
Add per interface fifo and per instance write list as a precursor
to implementing fairer sharing of the ospf6 oscket resources.
Signed-off-by: Pat Ruddy <pat@voltanet.io>
The following is implemented.
1. Configuring area as NSSA.
2. Generating Type 7 LSA.
3. Conversion of Type 7 to Type 5 ( Default Behavior).
4. NSSA ABR selection.
Reviewed-by: Rafael Zalamena <rzalamena@opensourcerouting.org>
Co-authored-by: Kaushik <kaushiknath.null@gmail.com>
Co-authored-by: Soman K.S <somanks@gmail.com>
Signed-off-by: Kaushik <kaushiknath.null@gmail.com>
The code had no limits on addresses configured on an interface running
ospf6d. The code would crash when more than 100 addresses were added.
This change limits the number of interface address to 100 if mtu is set
to the default value. If the mtu is set to a jumbo packet size or larger
we will support 200 interface addresses.
Signed-off-by: Lynne Morrison <lynne@voltanet.io>
1. Created new ospf6_redist structure.
2. Moved the 'route_map' structure from structure 'ospf6' to
structure 'ospf6_redist'.
3. Added new message type OSPF6_REDISTRIBUTE.
4. Added the placeholder for metric option in structure ospf6_redist
for redistribute.
5. Added few API's for route redistribute lookup, add & del.
Signed-off-by: Kaushik <kaushik@niralnetworks.com>
1. All the changes are related to handle ospf6 with different vrf.
2. The dependancy of global ospf6 is removed.
Co-authored-by: Kaushik <kaushik@niralnetworks.com>
Signed-off-by: harios_niral <hari@niralnetworks.com>
1. The socket() call is changed to vrf_socket().
2. The ospf6 instance creation api added.
3. The global socket fd is replaced with ospf6->fd.
4. All dependency of the global socket is resolved.
5. Added the ospf6 receive timer in the global structure.
6. Performed the thread off on receive timer when we do "no router ospf6".
Co-authored-by: harios <hari@niralnetworks.com>
Signed-off-by: Kaushik <kaushik@niralnetworks.com>
Some preprocessor constants converted to enums to make the names usable
in the preprocessor.
v2: better isolation between core and vty code to make future northbound
conversion easier.
Signed-off-by: David Lamparter <equinox@diac24.net>
