8280257cc9
Topology: A single router is acting as the First Hop Router (FHR), Last Hop Router (LHR), and RP. RC and Issue: When an upstream S,G is in join state, it sends a register message to the RP. If the RP has the receiver, it sends a register stop message and switches to the shortest path. When the register stop message is processed, it removes pimreg, moves to prune, and starts the reg stop timer. When the reg stop timer expires, PIM changes S,G state to Join Pending and sends out a NULL register message to RP. RP receives it and fails to send Reg stop because SPT is not set at that point. The problem is when the register stop timer pops and state is in Join Pending. According to https://www.rfc-editor.org/rfc/rfc4601#section-4.4.1, we need to put back the pimreg reg tunnel into the S,G mroute. This causes data to be sent to the control plane and subsequently interrupts the line rate. Fix: If the router is FHR and RP to the group, ignore SPT status and send out a register stop message back to the DR (in this context, the same router). Ticket: #3506780 Signed-off-by: Donald Sharp <sharpd@nvidia.com> Signed-off-by: Rajesh Varatharaj <rvaratharaj@nvidia.com> |
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FRRouting
FRR is free software that implements and manages various IPv4 and IPv6 routing protocols. It runs on nearly all distributions of Linux and BSD and supports all modern CPU architectures.
FRR currently supports the following protocols:
- BGP
- OSPFv2
- OSPFv3
- RIPv1
- RIPv2
- RIPng
- IS-IS
- PIM-SM/MSDP
- LDP
- BFD
- Babel
- PBR
- OpenFabric
- VRRP
- EIGRP (alpha)
- NHRP (alpha)
Installation & Use
For source tarballs, see the releases page.
For Debian and its derivatives, use the APT repository at https://deb.frrouting.org/.
Instructions on building and installing from source for supported platforms may be found in the developer docs.
Once installed, please refer to the user guide for instructions on use.
Community
The FRRouting email list server is located here and offers the following public lists:
| Topic | List |
|---|---|
| Development | dev@lists.frrouting.org |
| Users & Operators | frog@lists.frrouting.org |
| Announcements | announce@lists.frrouting.org |
For chat, we currently use Slack. You can join by clicking the "Slack" link under the Participate section of our website.
Contributing
FRR maintains developer's documentation which contains the project workflow and expectations for contributors. Some technical documentation on project internals is also available.
We welcome and appreciate all contributions, no matter how small!
Security
To report security issues, please use our security mailing list:
security [at] lists.frrouting.org