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Home Documentation Junos OS Junos CLI Reference CLI Reference C

Junos CLI Reference

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Junos CLI Reference
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copy-dont-fragment-bit (Services IPsec VPN)

date_range 19-Nov-23
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Syntax

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copy-dont-fragment-bit;

Hierarchy Level

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[edit services ipsec-vpn rule rule-name term term-name then]

Description

Copy the do not fragment (DF) bit value to only the outer header and not modify the inner header of the IPsec packet. If the encapsulated packet size exceeds the tunnel maximum transmission unit (MTU), the packet is fragmented before encapsulation. This functionality is supported on MX Series routers with MS-MICs and MS-MPCs. These settings apply for static endpoint tunnels and not for dynamic tunnels, for which you need to include the copy-dont-fragment-bit statement at the [edit services service-set service-set-name ipsec-vpn-options] hierarchy level to copy the DF bit value to only the outer header of the packet in a static IPsec tunnel. This functionality is supported on MX Series routers with MS-MICs and MS-MPCs.

By default, this statement is disabled on MS-MICs and MS-MPCs (the DF bit value is not copied to the outer header by default).

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 14.1.

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