Forum Discussion
Nimbostratusping showing LB Self Ip
Hi ,
Here is Scenario,
I have pool memeber 192.168.195.X and VIP is (192.168.166.100) ...... self ip on box is (192.168.195.1, 10.10.10.50.192.168.166.10)
all pool member default gateway pointing to 192.168.192.1
LB Route.. default gw 192.168.166.1
10.0.0.0 /8 10.10.10.3
There is not SNAT enable. just VIP and only one Pool member . simple config
My source is 10.66.66.100 from where i pinging. when i ping to VIP . I see reply coming from 10.10.10.50 (LB SELF IP) why ?
12 Replies
A__N_5261can any body.. help on this. i don't know why it showing LB IP
Greg_33932I think your looking for X-forward to be ON so it shows the source IP. Create a profile and check the box. and add the profile to the VIP.
What_Lies_Bene1Cirrostratus
I'd assume the 10.10.10.50 address is the 'external' Self IP on the BIG-IP in the path between the client and server and that as the BIG-IP is proxying for that server, its providing that address? This would make sense unless you were routing on the BIG-IP.
That or it's a bug. Anybody else?- A__N_5261Neo,
No, I am not looking for X-Forward. the concern is only when ping to VIP . i see reply from Self IP. - A__N_5261Yes 10.10.10.50 is external self ip address between client and server .does it okey if asymmetric routing is happening ?
- Stefan_Klotz
Cumulonimbus
Hi,
that's pretty easy, Ping towards a VIP will never be answered from the Poolmembers, but only from the VIP itself.
And as the sourceIP of the Ping-request is unknown for your BIG-IP (not directly connected) it uses the configured route (10.10.10.0/8 -> 10.10.10.3) for the reply. To reach the next hop 10.10.10.3 it uses its own IP from that network, which is 10.10.10.50.
So everything works correctly as designed ;)
Ciao Stefan :)
- What_Lies_Bene1Is asymmetric routing occurring? I've re-read your initial post and it suggests it is. Through the F5 on the way in to the server but not back from the server?
- A__N_5261i release after post. asymmetric routing is occurring.
- What_Lies_Bene1I also just realised you are pinging the VIP, for some reason I thought it was the Pool Member. That being the case I think this is expected behavior. The asymmetric routing doesn't come into it as you are pinging the VIP not the Pool Member.
- A__N_5261Thanks Steve
