X25 Pvc - HP MSR series Command Reference Manual
Layer 2 wan
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Also See for MSR series:
- Configuration manual (889 pages) ,
- Command reference manual (684 pages) ,
- Wan access configuration manual (293 pages)
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Usage guidelines
Usually, the X.25 packet-switching network has a limitation of the transmission packet size, and the
maximum size of a data packet sent by the DTE shall not exceed this size (otherwise, it will trigger the
reset of the virtual circuit). In this way, the DTE devices at sending end and receiving end are required to
have datagram fragmentation and reassembly functions. The DTE device at sending end fragments the
datagram with a length exceeding the maximum transmission packet length based on the maximum
transmission packet length, and sets M bit in other fragments except the final fragment. After receiving
these fragments, the DTE at receiving end will reassemble them to a datagram and submit it to the
upper-layer protocol based on the M bit. Consult access ISP about this maximum receiving packet length.
The maximum receiving packet length is equivalent to the maximum sending packet. Do not configure
these two parameters with different values unless the access ISP allows.
Examples
# Set the maximum receiving packet length and maximum sending packet length on X.25 interface Serial
2/0 to 256 bytes.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] x25 packet-size 256 256
x25 pvc
Use x25 pvc to configure a PVC route.
Use undo x25 pvc to delete a PVC route.
Syntax
x25 pvc pvc-number protocol-type protocol-address x121-address x.121-address [ option ]
undo x25 pvc pvc-number
Default
No PVC is created. When creating such a PVC, if you do not set the relevant attributes for the PVC, its
flow control parameters will be the same as that of the X.25 interface (the flow control parameters on an
X.25 interface can be set by the x25 packet-size and x25 window-size commands).
Views
Interface view
Default command level
2: System level
Parameters
pvc-number: PVC number, in the range 1 to 4095 (inclusive), and must be in the PVC channel range.
protocol-type: Upper-layer protocol carried over the permanent virtual circuit, which can be ip (indicating
that the upper-layer network protocol is IP protocol) or compressedtcp (indicating that the upper-layer
network protocol is IP protocol, and supports TCP head compressing).
protocol-address: Network protocol address of the peer end of the PVC.
x121-address x.121-address: Specifies the X.121 address of the peer end of this PVC.
option: Attribute option of the PVC.
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