Setup site-to-site IPsec tunnel for single BigIP partition

I am trying to setup a VPN between our on-premise environment and Microsoft Azure. The information is pretty straightforward and it should be quite easy. The only odd thing is that our external VIP is only available within a partition in the BigIP configuration and does not reside in /Common unlike all the examples.

Whenever I create a single IPsec IKE Peer under the administrative partition and set the remote address (leaving any other configuration untouched), the racoon service restarts. I find the following errors in the racoon log file:

2017-06-21 10:57:54: INFO: Reading configuration from "/etc/racoon/racoon.conf"
2017-06-21 10:57:54: ERROR: getaddrinfo(13.94.240.25%100,500): Name or service not known
2017-06-21 10:57:54: ERROR: fatal parse failure.
2017-06-21 10:57:54: ERROR: failed to parse configuration file.
2017-06-21 10:57:56: INFO: Reading configuration from "/etc/racoon/racoon.conf"
2017-06-21 10:57:56: ERROR: getaddrinfo(13.94.240.25%100,500): Name or service not known
2017-06-21 10:57:56: ERROR: fatal parse failure.
2017-06-21 10:57:56: ERROR: failed to parse configuration file.
2017-06-21 10:58:08: INFO: Reading configuration from "/etc/racoon/racoon.conf"
2017-06-21 10:58:08: ERROR: getaddrinfo(13.94.240.25%100,500): Name or service not known
2017-06-21 10:58:08: ERROR: fatal parse failure.
2017-06-21 10:58:08: ERROR: failed to parse configuration file.
2017-06-21 10:58:10: INFO: Reading configuration from "/etc/racoon/racoon.conf"
2017-06-21 10:58:10: ERROR: getaddrinfo(13.94.240.25%100,500): Name or service not known
2017-06-21 10:58:10: ERROR: fatal parse failure.
2017-06-21 10:58:10: ERROR: failed to parse configuration file.

The same thing happens if I create an IPsec Traffic Selector with our internal network:

2017-06-21 10:58:19: INFO: Reading configuration from "/etc/racoon/racoon.conf"
2017-06-21 10:58:19: ERROR: getaddrinfo(10.0.0.0%100,0): Name or service not known
2017-06-21 10:58:19: ERROR: fatal parse failure.
2017-06-21 10:58:19: ERROR: failed to parse configuration file.
2017-06-21 10:58:21: INFO: Reading configuration from "/etc/racoon/racoon.conf"
2017-06-21 10:58:21: ERROR: getaddrinfo(10.0.0.0%100,0): Name or service not known
2017-06-21 10:58:21: ERROR: fatal parse failure.
2017-06-21 10:58:21: ERROR: failed to parse configuration file.

100 is in this case the partition default route domain, but it seems it is not accepted?

Am I missing something or is it simply not possible to create an IPsec tunnel from any other partition but the default one; /Common?

Version: BIG-IP 11.5.4 Build 4.0.313 Hotfix HF4