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![]() Topology:
=========
RP---FHR<ens224>---Source
Problem Statement:
=================
Step 1:
Enable PIM and IGMP on source connected interface ens224
Step 2:
Start multicast traffic. (s,g) mroute and upstream will be created as expected.
dev# show ip mroute
IP Multicast Routing Table
Flags: S - Sparse, C - Connected, P - Pruned
R - SGRpt Pruned, F - Register flag, T - SPT-bit for SSM FHR
Source Group Flags Proto Input Output TTL Uptime
50.0.0.4 225.1.1.1 SF PIM ens224 pimreg 1 00:37:55
dev# show ip pim upstream
Iif Source Group State Uptime JoinTimer RSTimer KATimer RefCnt
ens224 50.0.0.4 225.1.1.1 NotJ,RegJ 00:37:57 --:--:-- --:--:-- 00:02:43 1
Step 3:
Disable PIM on source connected interafce ens224
dev# show ip mroute
IP Multicast Routing Table
Flags: S - Sparse, C - Connected, P - Pruned
R - SGRpt Pruned, F - Register flag, T - SPT-bit for SSM FHR
Source Group Flags Proto Input Output TTL Uptime
50.0.0.4 225.1.1.1 SF PIM ens224 pimreg 1 00:38:05
dev# show ip pim upstream
Iif Source Group State Uptime JoinTimer RSTimer KATimer RefCnt
ens224 50.0.0.4 225.1.1.1 NotJ,RegJ 00:38:08 --:--:-- --:--:-- 00:02:32 1
Step 4:
Disable IGMP on source connected interface ens224
dev# show ip pim upstream
Iif Source Group State Uptime JoinTimer RSTimer KATimer RefCnt
ens224 50.0.0.4 225.1.1.1 NotJ,RegJ 00:38:15 --:--:-- --:--:-- 00:03:27 1
dev# show ip mroute
IP Multicast Routing Table
Flags: S - Sparse, C - Connected, P - Pruned
R - SGRpt Pruned, F - Register flag, T - SPT-bit for SSM FHR
Source Group Flags Proto Input Output TTL Uptime
50.0.0.4 225.1.1.1 SF PIM <iif?> pimreg 1 00:38:18
Pim upstream IIF is still pointing towards the source connected
interface which is not pim enabled and not IGMP enabled and
Mroute is still present in the kernel and KAT timer is still running
on the interface, where ifp->info is already set to NULL.
This leads to crash.
Root Cause:
==========
When "no ip pim" commands get executed on source connected interface,
we are updating upstream IIF only when IGMP is not enabled on the same
interface.
Fix:
===
When PIM is disabled on source connected interface, update upstream IIF
no matter if IGMP is enabled or not on the same interface.
Issue: #12848
Issue: #10782
Signed-off-by: Sarita Patra <saritap@vmware.com>
(cherry picked from commit
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.. | ||
.gitignore | ||
AUTHORS | ||
CAVEATS | ||
COMMANDS | ||
COPYING | ||
DEBUG | ||
LINUX_KERNEL_MROUTE_MFC | ||
Makefile | ||
mtracebis_netlink.c | ||
mtracebis_netlink.h | ||
mtracebis_routeget.c | ||
mtracebis_routeget.h | ||
mtracebis.c | ||
pim6_cmd.c | ||
pim6_cmd.h | ||
pim6_main.c | ||
pim6_mld_protocol.h | ||
pim6_mld.c | ||
pim6_mld.h | ||
pim_addr.c | ||
pim_addr.h | ||
pim_assert.c | ||
pim_assert.h | ||
pim_bfd.c | ||
pim_bfd.h | ||
pim_bsm.c | ||
pim_bsm.h | ||
pim_cmd_common.c | ||
pim_cmd_common.h | ||
pim_cmd.c | ||
pim_cmd.h | ||
pim_errors.c | ||
pim_errors.h | ||
pim_hello.c | ||
pim_hello.h | ||
pim_iface.c | ||
pim_iface.h | ||
pim_ifchannel.c | ||
pim_ifchannel.h | ||
pim_igmp_join.h | ||
pim_igmp_mtrace.c | ||
pim_igmp_mtrace.h | ||
pim_igmp_stats.c | ||
pim_igmp_stats.h | ||
pim_igmp.c | ||
pim_igmp.h | ||
pim_igmpv2.c | ||
pim_igmpv2.h | ||
pim_igmpv3.c | ||
pim_igmpv3.h | ||
pim_instance.c | ||
pim_instance.h | ||
pim_int.c | ||
pim_int.h | ||
pim_join.c | ||
pim_join.h | ||
pim_jp_agg.c | ||
pim_jp_agg.h | ||
pim_macro.c | ||
pim_macro.h | ||
pim_main.c | ||
pim_memory.c | ||
pim_memory.h | ||
pim_mlag.c | ||
pim_mlag.h | ||
pim_mroute.c | ||
pim_mroute.h | ||
pim_msdp_packet.c | ||
pim_msdp_packet.h | ||
pim_msdp_socket.c | ||
pim_msdp_socket.h | ||
pim_msdp.c | ||
pim_msdp.h | ||
pim_msg.c | ||
pim_msg.h | ||
pim_nb_config.c | ||
pim_nb.c | ||
pim_nb.h | ||
pim_neighbor.c | ||
pim_neighbor.h | ||
pim_nht.c | ||
pim_nht.h | ||
pim_oil.c | ||
pim_oil.h | ||
pim_pim.c | ||
pim_pim.h | ||
pim_register.c | ||
pim_register.h | ||
pim_routemap.c | ||
pim_rp.c | ||
pim_rp.h | ||
pim_rpf.c | ||
pim_rpf.h | ||
pim_signals.c | ||
pim_signals.h | ||
pim_sock.c | ||
pim_sock.h | ||
pim_ssm.c | ||
pim_ssm.h | ||
pim_ssmpingd.c | ||
pim_ssmpingd.h | ||
pim_static.c | ||
pim_static.h | ||
pim_str.c | ||
pim_str.h | ||
pim_tib.c | ||
pim_tib.h | ||
pim_time.c | ||
pim_time.h | ||
pim_tlv.c | ||
pim_tlv.h | ||
pim_upstream.c | ||
pim_upstream.h | ||
pim_util.c | ||
pim_util.h | ||
pim_vty.c | ||
pim_vty.h | ||
pim_vxlan_instance.h | ||
pim_vxlan.c | ||
pim_vxlan.h | ||
pim_zebra.c | ||
pim_zebra.h | ||
pim_zlookup.c | ||
pim_zlookup.h | ||
pim_zpthread.c | ||
pimd.c | ||
pimd.h | ||
README | ||
subdir.am | ||
test_igmpv3_join.c | ||
TODO | ||
TROUBLESHOOTING |
INTRODUCTION qpimd aims to implement a PIM (Protocol Independent Multicast) daemon for the FRR Routing Suite. qpimd implements PIM-SM (Sparse Mode) of RFC 4601. Additionally MSDP has been implemented. In order to deliver end-to-end multicast routing control plane, qpimd includes the router-side of IGMPv[2|3] (RFC 3376). LICENSE qpimd - pimd for FRR Copyright (C) 2008 Everton da Silva Marques qpimd is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. qpimd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with qpimd; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. HOME SITE qpimd lives at: https://github.com/frrouting/frr PLATFORMS qpimd has been tested with Debian Jessie. REQUIREMENTS qpimd requires FRR (2.0 or higher) CONFIGURATION COMMANDS See available commands in the file pimd/COMMANDS. KNOWN CAVEATS See list of known caveats in the file pimd/CAVEATS. SUPPORT Please post comments, questions, patches, bug reports at the support site: https://frrouting.org/frr RELATED WORK igmprt: An IGMPv3-router implementation - http://www.loria.fr/~lahmadi/igmpv3-router.html USC pimd: PIMv2-SM daemon - http://netweb.usc.edu/pim/pimd (URL broken in 2008-12-23) - http://packages.debian.org/source/sid/pimd (from Debian) troglobit pimd: This is the original USC pimd from http://netweb.usc.edu/pim/. In January 16, 2010 it was revived with the intention to collect patches floating around in Debian, Gentoo, Lintrack and other distribution repositories and to provide a central point of collaboration. - http://github.com/troglobit/pimd zpimd: zpimd is not dependent of zebra or any other routing daemon - ftp://robur.slu.se/pub/Routing/Zebra - http://sunsite2.icm.edu.pl/pub/unix/routing/zpimd mrd6: an IPv6 Multicast Router for Linux systems - http://fivebits.net/proj/mrd6/ MBGP: Implementation of RFC 2858 for Quagga - git://git.coplanar.net/~balajig/quagga - http://www.gossamer-threads.com/lists/quagga/dev/18000 REFERENCES IANA Protocol Independent Multicast (PIM) Parameters http://www.iana.org/assignments/pim-parameters/pim-parameters.txt Address Family Numbers http://www.iana.org/assignments/address-family-numbers -- END --