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BIG-IP Peer self local IP cannot be ping


Hi Expert,

I have a big-ip in HA setting.

But if I am in primary one, I cannot ping peer local self IP.

I can ping primary local and floating IP.

I check this link, and I do tcpdump in primary one, I can see I am using primary local self IP as source IP.

In peer one tcpdump, I can see 

12:14:59.719138 ARP, Request who-has tell, length 48 out slot1/tmm2 lis=

It seems the ARP not completed, so it should fix in network side or BIG-IP? is my gateway and is peer local self ip


In primary one tcpdump, I can see below:

12:19:48.827770 ARP, Request who-has tell, length 48 out slot1/tmm1 lis= is my loca self ip


Community Manager
Community Manager

Hey @SolarJeans - I think maybe @Mohamed_Ahmed_Kansoh may be able to answer this one?

Thanks @Leslie_Hubertus . 
Hi @SolarJeans , 

What I understood till now , 
- if you're in primary node you can ping ( primary node self ip and floating ip ) that's make sense because it's owned by primary one. 

- you can't ping the peer self ip ( ).

- I think the linked article will not help you in this case 

 I want to know The below results when tring to ping both of devices ? 
as I see in this one "  12:14:59.719138 ARP, Request who-has tell, length 48 out slot1/tmm2 lis= " you are directed to ask the gateway. 

- Could you please to check the assigned Vlan ( 2 local self ips and floating one ) make sure they are a in the same correct Vlan.

- I see you connects both of f5 devices by a L3 switch , so can you try to ping the Big-ips gateway ( Switch interface ip ) which connects with both of Big-ip devices in this subnet ( 172.166.94.x ). 

- If I miss some points please explain to me your network connectivity ( Vlans and a simple design ) to see which devices interacts with Bigip. 

- Try to ping ( the Local self IP and Floating one )of the Peer device from Peer device itself.

I will wait your response 

Mohamed Kansoh

Hi @SolarJeans  - if you still need assistance with this, can you please answer @Mohamed_Ahmed_Kansoh's questions so he can help?


Sorry for late reply

They are in corrected vlan. However, the peer one cannot ping the gateway.

It seems this is network problem instead of BIG-IP problem

Hi @SolarJeans , 

Try to add a static ARP entry in both Bigip boxes. 


issue this command on tmsh : 
#show net vlan
and get the HA vlans MAC addresses on both devices.

Second ) 
Add a static ARP entry for both devices in each other. 
Follow this KB to do it :

on brief , I want you to give up using dynamic arp to map IP & MAC , and using a static entry instead to define your issue is related to big ip interfaces , of one of your nodes can't resolve arp requests. 

Chack again and let me know

Mohamed Kansoh