0f31a82a11
Series of events leading to the problem - 1. (S,G) has been pruned on the rp on downlink-1 2. a (*,G) join is rxed on downlink-1 without the source S. This results in the (S,G,rpt) prune state being cleared on downlink-1. As a part of the clear the ifchannel associated with downlink-1 is deleted. 3. The ifchannel_delete handling is expected to add downlink-1 as an inherited OIF to the channel OIL (which it does). However it is also added in as an immediate OIF (accidentally) as the ifchannel is still present (in the process of being deleted). To avoid the problem defer pim_upstream_update_join_desired evaluation until after the channel is deleted. Relevant debug logs - PIM: pim_ifchannel_delete: ifchannel entry (27.0.0.15,239.1.1.106)(downlink-1) del start PIM: pim_channel_add_oif(pim_ifchannel_delete): (S,G)=(27.0.0.15,239.1.1.106): proto_mask=4 OIF=downlink-1 vif_index=7: DONE PIM: pimd/pim_oil.c pim_channel_del_oif: no existing protocol mask 2(4) for requested OIF downlink-1 (vif_index=7, min_ttl=1) for channel (S,G)=(27.0.0.15,239.1.1.106) PIM: pim_upstream_switch: PIM_UPSTREAM_(27.0.0.15,239.1.1.106): (S,G) old: NotJoined new: Joined PIM: pim_channel_add_oif(pim_upstream_inherited_olist_decide): (S,G)=(27.0.0.15,239.1.1.106): proto_mask=2 OIF=downlink-1 vif_index=7 added to 0x6 >>>>>>>>>>>>>>>>>> PIM: pim_upstream_del(pim_ifchannel_delete): Delete (27.0.0.15,239.1.1.106)[default] ref count: 2 , flags: 81 c_oil ref count 1 (Pre decrement) PIM: pim_ifchannel_delete: ifchannel entry (27.0.0.15,239.1.1.106)(downlink-1) del end Ticket: CM-26732 Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.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 as well as Solaris 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