Cisco Systems show crypto isakmp sa - src/dst explanation

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Subject Author Date
show crypto isakmp sa - src/dst explanation Piotr 09-10-08
Posted by Piotr on September 10, 2008, 3:42 am
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I'm setting a vpn lab and there is one thing I don't really understand
from show crypt isakmp sa output.

The HQ router (10.0.0.1) is terminating all vpn connections. However I
need a clarification about dst and src columns in the following output.

Why 10.0.0.1 is either in dst or src column? What does it mean?

HQ#show crypto isakmp sa
dst src state conn-id slot status
10.0.0.1 192.168.1.1 QM_IDLE 945 0 ACTIVE
10.0.0.1 192.168.2.1 QM_IDLE 1443 0 ACTIVE
192.168.3.1 10.0.0.1 QM_IDLE 701 0 ACTIVE
10.0.0.1 192.168.4.1 QM_IDLE 1435 0 ACTIVE

Posted by marco74 on September 10, 2008, 10:25 am
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> I'm setting a vpn lab and there is one thing I don't really understand
> from show crypt isakmp sa output.
>
> The HQ router (10.0.0.1) is terminating all vpn connections. However I
> need a clarification about dst and src columns in the following output.
>
> Why 10.0.0.1 is either in dst or src column? What does it mean?
>
> HQ#show crypto isakmp sa
> dst =A0 =A0 =A0 =A0 =A0 =A0 src =A0 =A0 =A0 =A0 =A0 =A0 state =A0 =A0 =A0=
=A0 =A0conn-id slot status
> 10.0.0.1 192.168.1.1 =A0 =A0QM_IDLE =A0 =A0 =A0 =A0 =A0 =A0945 =A0 =A00 A=
CTIVE
> 10.0.0.1 192.168.2.1 =A0QM_IDLE =A0 =A0 =A0 =A0 =A0 1443 =A0 =A00 ACTIVE
> 192.168.3.1 10.0.0.1 QM_IDLE =A0 =A0 =A0 =A0 =A0 =A0701 =A0 =A00 ACTIVE
> 10.0.0.1 192.168.4.1 =A0 =A0QM_IDLE =A0 =A0 =A0 =A0 =A0 1435 =A0 =A00 ACT=
IVE

It depends on the devices who started the VPN session; sometimes
10.0.0.1 sent the first initialization packet, sometimes it didn't.

Posted by Piotr on September 11, 2008, 1:36 am
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marco74 wrote:
>> I'm setting a vpn lab and there is one thing I don't really understand
>> from show crypt isakmp sa output.
>>
>> The HQ router (10.0.0.1) is terminating all vpn connections. However I
>> need a clarification about dst and src columns in the following output.
>>
>> Why 10.0.0.1 is either in dst or src column? What does it mean?
>>
>> HQ#show crypto isakmp sa
>> dst src state conn-id slot status
>> 10.0.0.1 192.168.1.1 QM_IDLE 945 0 ACTIVE
>> 10.0.0.1 192.168.2.1 QM_IDLE 1443 0 ACTIVE
>> 192.168.3.1 10.0.0.1 QM_IDLE 701 0 ACTIVE
>> 10.0.0.1 192.168.4.1 QM_IDLE 1435 0 ACTIVE
>
> It depends on the devices who started the VPN session; sometimes
> 10.0.0.1 sent the first initialization packet, sometimes it didn't.

Just like I suspected. Thanks!

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