Junos OS

Dear wonderful team,

I have a cisco 7200 as src Mcast 239.16.1.1. it is running sparse mode with SRX 340. I have setup destination nat on ge-0/0/1 to nat mcast from 239.16.1.1 to 239.141.1.10.

destination nat on SRX:

set security nat destination pool NAT_Mcast address 239.141.1.10/32

set security nat destination rule-set NAT_Mcast_1 from interface ge-0/0/1.0

set security nat destination rule-set NAT_Mcast_1 rule R1 match destination-address 239.16.1.1/32

set security nat destination rule-set NAT_Mcast_1 rule R1 then destination-nat pool NAT_Mcast

with sparse mode, it does not nat and does not NAT. when I switch to dense-mode, it works as expected.

PIM neighbor is up on both side (SRX and Src Mcast)

rp on SRX:

set protocols pim rp static address 192.168.0.1 group-ranges 239.141.1.10/32

set protocols pim rp static address 192.168.1.1 group-ranges 239.16.1.1/32

rp on src Mcast cisco:

ip pim rp-add 192.168.1.1 239.16.1.1

I changed the RP address for 239.16.1.1 to 192.168.1.2, but no luck

however, when I replace src Mcast cisco router with a PC, it nats properly.

unicast routing is good.

SRX interface:

set interfaces ge-0/0/1 unit 0 family inet address 192.168.1.1/24

set protocols ospf area 0.0.0.0 interface ge-0/0/1.0

set protocols igmp interface ge-0/0/1.0 static group 239.16.1.1

set protocols pim interface ge-0/0/1.0 mode sparse

Cisco interface:

interface FastEthernet0/0

ip address 192.168.1.2 255.255.255.0

ip pim sparse-mode

ip igmp join-group 239.16.1.1

duplex half

any idea why sparse mode does make SRX not to nat?

thanks in advance