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Configuring the ETEP
48
ETEP CLI User Guide
provides a description of each command along with its default setting.
Reassembling Fragmented Packets
The
reassembly
command applies to packets entering the ETEP’s local port that are subject to
fragmentation. This command specifies whether packets are fragmented before or after they are encrypted
and who performs the reassembly of the fragmented packet: the destination host or gateway.
The reassembly mode command applies only when the ETEP’s policy mode is set to Layer 3. When the
policy mode is set to Layer 2, packets that are subject to fragmentation are encrypted prior to
fragmentation. Layer 2 jumbo packets that exceed the PMTU are discarded.
When the reassembly command is set to
gateway
, the ETEP sets the dfbit-ignore command to
on
. When
the reassembly command is set to
host
, the ETEP sets the dfbit-ignore command to off by default but
allows the setting to be changed.
To configure reassembly on the ETEP:
1 Enter local configuration mode.
admin> configure
config> local interface
2 Configure the
reassembly
command. Attributes are described in
reassembly {host | gateway}
Table 20
Commands that control network interoperability
Command
Description
Default Setting
reassembly
Specifies who performs the
reassembly of fragmented
packets: the destination host or
gateway. The gateway setting is
needed for ETEP to ETEP
connections.
gateway
dfbit-ignore
Specifies whether to accept or
ignore the DF bit setting in the
IP packet header.
on
ipv6Traffic
Specifies what to do with IPv6
packets that are received on the
local or remote ports: discard
them or pass them in the clear.
clear
dhcprelay
Allows DHCP clients on the
local port subnet to access a
DHCP server that is on a
different subnet.
disabled
Table 21
reassembly command description
Attribute
Description
host
This setting is required for the ETEPs to interoperate successfully with some
security gateways. Packets are fragmented before they are encrypted, and
the encryption header is added to the packet fragments. The destination
host performs the reassembly.
gateway
This setting is recommended for ETEP-ETEP encryption. Packets are
encrypted first and then fragmented based on the new packet size, which
includes the encryption header. This behavior is consistent with RFC 2401.
The gateway (ETEP) performs the reassembly.This is the default setting.
Содержание ET0010A
Страница 7: ...8 ETEP CLI User Guide Contents...
Страница 15: ...Getting Started 16 ETEP CLI User Guide...
Страница 33: ...User Administration 34 ETEP CLI User Guide...
Страница 55: ...Configuring the ETEP 56 ETEP CLI User Guide...
Страница 97: ...Creating Policies 98 ETEP CLI User Guide...
Страница 101: ...Maintenance 102 ETEP CLI User Guide...
Страница 119: ...Troubleshooting 120 ETEP CLI User Guide...
Страница 123: ...FIPS 140 2 Level 2 Operation 124 ETEP CLI User Guide...
Страница 205: ...Command Reference 206 ETEP CLI User Guide...
Страница 211: ...Index 212 ETEP CLI User Guide...