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Supported Platforms
gre-out
Syntax
gre-out {mss value;}
Hierarchy Level
[edit security flow tcp-mss]
Release Information
Statement introduced in Release 8.5 of Junos OS.
Description
Enable and specify the TCP maximum segment size (TCP MSS) for Generic Routing Encapsulation (GRE) packets that are going into an IPsec VPN tunnel. If the device receives a GRE-encapsulated TCP packet with the SYN bit and TCP MSS option set and the TCP MSS option specified in the packet exceeds the TCP MSS specified by the device, the device modifies the TCP MSS value accordingly. By default, a TCP MSS for GRE packets is not set.
Options
mss value—TCP MSS for GRE packets. Value is optional.
Range: 64 through 65,535 bytes
Default: 1320 bytes
Required Privilege Level
security—To view this statement in the configuration.
security-control—To add this statement to the configuration.
