Junos OS

I have tried almost everyting but no luck. This is very simple configuration. On juniper end I have below 

set interfaces ge-8/3/5 speed 1g
set interfaces ge-8/3/5 gigether-options auto-negotiation
set interfaces ge-8/3/5 unit 0 family inet address 10.3.3.81/30
On Cisco end 

interface GigabitEthernet0/0/0
ip address 10.3.3.82 255.255.255.252
negotiation auto
end
========================T-shooting steps I did=====================
1: Changed fiber. 2: Change SFPs on both end. 3: Changed speed, negotiation on Juniper as well as on Cisco. 

Interface is up up on both ends. 
I can see both guys see MAC address of each other. BUT Cisco end dont see traffic incoming when I ping from Juniper. 

Only thing I find so far is. Juniper can see traffic from Cisco ping but Cisco can't see traffic from Juniper pings. 
Policies, security looks good. 

It might help if you could post the full configuration to be sure there aren't any firewall filters, different routing-instances, etc. involved on either end.  Also, if this is fiber, why would you be setting negotiation-settings on either end?

-Ron

Try specifying the interface when you do the ping on the Juniper to make sure this is sourced correctly.

ping 10.3.3.82 interface ge-8/3/5.0

Just adding to what is already suggested. If you have already verified that there are no issues at the physical level then you can probably configure static arp on both ends and then configure a firewall filter on Juniper router to count the ICMP packets in both input and output directions.

Something like this:

set firewall family inet filter test term 1 from source-address 10.3.3.81/32
set firewall family inet filter test term 1 from destination-address 10.3.3.82/32
set firewall family inet filter test term 1 from protocol icmp
set firewall family inet filter test term 1 then count icmp-out
set firewall family inet filter test term 1 then accept
set firewall family inet filter test term 2 from source-address 10.3.3.82/32
set firewall family inet filter test term 2 from destination-address 10.3.3.1/32
set firewall family inet filter test term 2 from protocol icmp
set firewall family inet filter test term 2 then count icmp-in
set firewall family inet filter test term 2 then accept
set firewall family inet filter test term 3 then accept

set interfaces <interface-name> unit 0 family inet filter input test
set interfaces <interface-name> unit 0 family inet filter output test

This will help to understand in which direction the packets are getting dropped and narrow down further.

Hi

please Try this on juniper side

set interfaces ge-8/3/5 speed 1g
set interfaces ge-8/3/5 gigether-options no-auto-negotiation

set interfaces ge-8/3/5 link-mode full duplex

Rgds

Srijith H