PIM: Can not delete first Oif, after add more static oifs.

FRRouting / frr

The FRRouting Protocol Suite

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PIM: Can not delete first Oif, after add more static oifs. #14905

Open fangyuan1004 opened 7 months ago

fangyuan1004 commented 7 months ago

Frr version: 9.1-dev
Setp1: add 2 static Oifs on vlan 1

MARVELL_LINUX# configure MARVELL_LINUX(config)# interface vlan1 MARVELL_LINUX(config-if)# ip pim MARVELL_LINUX(config-if)# interface vlan2 MARVELL_LINUX(config-if)# ip pim MARVELL_LINUX(config-if)# interface vlan3 MARVELL_LINUX(config-if)# ip pim MARVELL_LINUX(config-if)# interface vlan1 MARVELL_LINUX(config-if)# ip mroute vlan2 239.1.1.1 MARVELL_LINUX(config-if)# ip mroute vlan3 239.1.1.1
Setp2: delete first Oif

MARVELL_LINUX(config-if)# no ip mroute vlan2 239.1.1.1
result: Can not delete first Oif, but delete last Oif

MARVELL_LINUX# show ip mroute 239.1.1.1 - STATIC vlan1 vlan2 1 00:00:42

Jafaral commented 7 months ago

Can you do show run before you delete the second one? If I recall, the kernel can't have more than one route from the same interface and the same group. So the second route you add just replace the first one.

fangyuan1004 commented 6 months ago

After I add 2 Outif, result is

show running-config interface vlan1 ip mroute vlan2 239.1.1.1 ip mroute vlan3 239.1.1.1
show ip mroute Source Group Flags Proto Input Output TTL Uptime * 239.1.1.1 - Static vlan1 vlan2 1 00:00:24 * 239.1.1.1 - Static vlan3 1 00:00:21
cat /proc/net/ip_mr_cache Group Origin Iif Pkts Bytes Wrong Oifs 010101EF 00000000 12345 12345 0 1:1 2:1 3:1
cat /proc/net/ip_mr_vif Interface
0 pimreg 1 vlan2 2 vlan1 3 vlan3

Can add more than one Outif in same interface and the same group?

If it can, how to delete first of them?

thanks.

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