[strongSwan] Multiple Child SA after only 14 minutes

Tom Rymes trymes at rymes.com
Mon Feb 9 19:11:31 CET 2015

I am having some connectivity issues and I am not certain if this is a 
symptom or the cause. On one of my machines I see the following:

[root at hudson ~]# ipsec status
Routed Connections:
         Data{1}:  ROUTED, TUNNEL
         Data{1}: ===
Security Associations (1 up, 0 connecting):
         Data[6]: ESTABLISHED 14 minutes ago,[C=US, 
ST=XX, O=something, OU=Some Dept, 
CN=hostname.domain.dom]...XX.YY.ZZ.XX[C=US, ST=XX, O=something, OU=Some 
Dept, CN=domain.dom]
         Data{1}:  INSTALLED, TUNNEL, ESP SPIs: c7efeef8_i c583fdba_o, 
IPCOMP CPIs: bf58_i c959_o
         Data{1}: ===
         Data{1}:  INSTALLED, TUNNEL, ESP SPIs: c5f5025b_i cfeb18ba_o, 
IPCOMP CPIs: 0a35_i d9e7_o
         Data{1}: ===
         Data{1}:  INSTALLED, TUNNEL, ESP SPIs: c0f0123d_i c9452af2_o, 
IPCOMP CPIs: 5026_i cc69_o
         Data{1}: ===

Why are there three Child SAs installed if the tunnel has only been up 
for 14 minutes and ikelifetime=8h and keylife=1h?


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