Manual

Layer 2 Tunnel Protocol Version 3
sequencing
130
Cisco IOS Releases 12.0(29)S and 12.2(25)S
sequencing
To configure the direction in which sequencing is enabled for data packets in an a Layer 2 Tunnel
Protocol Version 3 (L2TPv3) pseudowire, use the sequencing command in pseudowire class
configuration mode. To remove the sequencing configuration from the pseudowire class, use the no form
of this command.
sequencing {transmit | receive | both}
no sequencing {transmit | receive | both}
Syntax Description
Defaults Sequencing is off.
Command Modes Pseudowire class configuration
Command History
Usage Guidelines When you enable sequencing using any of the available options, L2TPv3 automatically enables the
sending of sequence numbers and requests the remote provider edge (PE) peer to send sequence
numbers. Out-of-order packets received on the pseudowire are dropped only if you use the sequencing
receive or sequencing both command.
In Cisco IOS Release 12.0(23)S, sequencing is not supported on the Cisco 10720 Internet router and the
Cisco 12000 series Internet routers. If the L2TPv3 peer router requests sequence numbers for an L2TPv3
session configured on a Cisco 10720 Internet router or Cisco 12000 series Internet router, the request to
establish the session is denied.
If sequencing is enabled for L2TPv3 pseudowires on the Cisco 7500 series in a release prior to
Cisco IOS Release 12.0(28)S, all traffic on the pseudowire is switched through the Route Switch
Processor (RSP) regardless of the setting configured with the ip cef distributed command.
transmit Updates the Sequence Number field in the headers of data packets sent over
the pseudowire according to the data encapsulation method that is used.
receive Keeps the value in the Sequence Number field in the headers of data packets
received over the pseudowire. Out-of-order packets are dropped.
both Enables both the transmit and receive options.
Release Modification
12.0(23)S This command was introduced.
12.2(25)S This command was integrated into Cisco IOS Release 12.2(25)S.