ESR service routers. ESR-Series. Functionality description. Version 1.12.0
60
Step
Description
Command
Keys
16
Enable verification of the presence
and consistency of checksum values
in the headers of GRE packets being
received. Also it is necessary to
enable calculation of the checksum
on the remote side.
(optionally)
esr(config-gre)#
remote checksum
17
Enable the check for tunnel remote
gateway availability (optionally)
esr(config-gre)#
keepalive enable
18
Change the keepalive packets timeout
from the opposing party (optional)
esr(config-gre)#
keepalive timeout
<TIME>
<TIME> – time in seconds, takes
values of [1..32767].
Default value: 10
19
Change the number of attempts to
check the availability of a tunnel
remote gateway (optionally)
esr(config-gre)#
keepalive retries
<VALUE>
<VALUE> – number of attempts,
takes values in the range of [1..255].
Default value: 5
20
Specify the IP address for the
keepalive mechanism (mandatory in
ethernet mode)
esr(config-gre)#
keepalive dst-address
<ADDR>
<ADDR> – IP address to check GRE
tunnel capability.
21
Change the time interval during which
the statistics on the tunnel load is
averaged (optional).
esr(config-gre)#
load-average <TIME>
<TIME> – interval in seconds, takes
values of [5..150].
Default value: 5
22
Enable sending snmp-trap about
tunnel enabling/disabling.
esr(config-gre)# snmp
init-trap
23
Enable the mechanism of IP
addresses iterative query using DHCP
on the specified interfaces when the
GRE tunnel is disconnected via
keepalive (optionally)
esr(config-gre)#
keepalive dhcp
dependent-interface
<IF>
<IF> – physical/logical interface on
which IP address obtaining via DHCP
is enabled.
24
Specify the time interval between GRE
tunnel disabling and IP address
iterative query on the interface/
interfaces specified by the keepalive
dhcp dependent-interface command
(optionally)
esr(config-gre)#
keepalive dhcp link-
timeout <SEC>
<SEC> – time interval between GRE
tunnel disabling and IP address
requery via DHCP on the interfaces
25
Override the MSS (Maximum segment
size) field in incoming TCP packets
(optional).
esr(config-gre)# ip
tcp adjust-mss <MSS>
<MSS> – MSS value, takes values in
the range of [500..1460].
Default value: 1460