For Layer 2 IPsec VPN tunnels, all management servers (CAPWAP, Syslog, SNMP, NTP,
RADIUS, Active Directory, and LDAP) should be reachable from the VPN client without
tunneling by default. However, you might want to tunnel some or all management
traffic from the VPN client to servers on the main network.
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Go to .
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Select an existing VPN service, and then select
, or select 
.
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In the Optional
Settings section, expand Advanced Client
Options.
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For Management Tunnel Traffic
Options:
Note
Set the following
options only when the servers are in a different subnet from that of the
tunnel interface. When they are in the same subnet, tunneling is
automatic. In addition, the IP address/host name objects for the
following servers must have IP address definitions as opposed to host
name definitions.
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Select ExtremeCloud IQ
(CAPWAP) to tunnel all CAPWAP (Control and Provisioning
of Wireless Access Points) traffic from VPN clients to ExtremeCloud IQ,
which is a CAPWAP server.
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Select Syslog to
send log entries to a syslog server through the VPN tunnel.
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Select SNMP
Traps to send all SNMP traps through the VPN tunnel to
an SNMP management system.
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Select NTP to
tunnel all NTP traffic from VPN clients to an NTP server.
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Select RADIUS to
tunnel all RADIUS traffic from VPN clients to a RADIUS authentication
server.
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Select Active
Directory to tunnel all traffic from an Extreme Networks
RADIUS authentication server to an Active Directory server.
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Select LDAP to
tunnel all traffic from a RADIUS authentication server to an LDAP
server.
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Select Enable NAT
Traversal to enable VPN traffic to traverse NAT devices.
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Configure the DPD (Dead Peer Detection)
Settings.
The DPD and tunnel heartbeat settings control when to fail over from the
primary to the secondary VPN server. The DPD messages verify the presence of
an IKE peer, and AMRP (Advanced Mobility Routing Protocol) tunnel heartbeats
verify communications through the GRE and VPN tunnel. The failure of either
mechanism can trigger a failover.
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Set the Heartbeat
Interval for sending DPD R-U-There heartbeat messages
from the VPN client to the VPN gateway.
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Set the number of times
to retry sending a DPD R-U-There message when it does not elicit a
response.
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Set the amount of time
between retries.
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For Tunnel Heartbeat
Settings:
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Set the Interval
for sending AMRP heartbeats through the GRE and VPN tunnel from the VPN
client to the VPN server.
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Set the number of times
to Retry sending a heartbeat if the VPN server fails to
respond.
After a heartbeat fails to elicit a response from the VPN server, the
VPN client retries every second.
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Select SAVE.
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