
ESR service routers. ESR-Series. Functionality description. Version 1.12.0
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esr# show tunnels status l2tpv3
333
To view sent and received packet counters, use the following command:
esr# show tunnels counters l2tpv3
333
To view the tunnel configuration, use the following command:
esr# show tunnels configuration l2tpv3
333
3.4 IPsec VPN configuration
IPsec is a set of protocols that enable security features for data transferred via IP protocol. This set of
protocols allows for identity validation (authentication), IP packet integrity check and encryption, and also
includes protocols for secure key exchange over the Internet.
3.4.1 Route-based IPsec VPN configuration algorithm
Step
Description
Command
Keys
1
Create a VTI tunnel and switch to
its configuration mode.
esr(config)# tunnel
vti <TUN>
<TUN> – device tunnel name.
2
Specify the local IP address of the
VTI tunnel.
esr(config-vti)#local
address <ADDR>
<ADDR> – IP address of a local
gateway.
3
Specify the remote IP address of
the VTI tunnel.
esr(config-
vti)#remote address
<ADDR>
<ADDR> – IP address of a remote
gateway.
4
Specify the IP address of the VTI
tunnel local side.
esr(config-vti)# ip
address <ADDR/LEN>
<ADDR/LEN> – IP address and prefix
of a subnet, defined as
AAA.BBB.CCC.DDD/EE where each
part AAA-DDD takes values of [0..255]
and EE takes values of [1..32].
5
Include the VTI tunnel in a security
zone and configure interaction
rules between zones or disable
firewall for VTI tunnel.
esr(config-vti)#
security-zone<NAME>
<NAME> – security zone name, set by
the string of up to 12 characters.
esr(config-vti)# ip
firewall disable
6
Enable the tunnel.
esr(config-
vti)#enable
In addition to tunnel creation, you should enable UDP inbound traffic in the firewall with source port
519 and destination port 519.