My dumb self.

.ssh/config.d/20_endless

@@ -9,7 +9,6 @@ Host braavos.endlessm-sf.com
 KexAlgorithms diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
 MACs hmac-sha1
 User sysmgr
-IdentityFile ~/.ssh/endless_rsa
 
 Host ap?.endlessm-sf.com
 Ciphers aes256-cbc
@@ -30,3 +29,4 @@ ProxyCommand ssh vpn-router.uw2.endlessm.com -W %h:%p
 Host 172.31.*.* 10.*.*.* *.endlessm.com *.endlessm-sf.com endlessm.com
 User nimrod
 IdentityFile ~/.ssh/endless_ecdsa
+IdentityFile ~/.ssh/endless_rsa