Frame relay FRF.20 IP header compression configuration example

As shown in Figure 32, Router A and Router B are interconnected with a frame relay link. Enable FRF.20 IP compression on the two routers.

1. Configure Router A:

   # Enable frame relay on interface Serial 2/0.

   <RouterA> system-view
   [RouterA] interface serial 2/0
   [RouterA-Serial2/0] link-protocol fr
   

   # Configure an IP address for interface Serial 2/0.

   [RouterA-Serial2/0] ip address 10.1.1.1 24
   

   # Configure interface Serial 2/0 to operate in DTE mode.

   [RouterA-Serial2/0] fr interface-type dte
   [RouterA-Serial2/0] quit
   

   # Configure a static route, setting the destination IP address to 12.1.1.2/24 and next hop IP address to 10.1.1.2.

   [RouterA] ip route-static 12.1.1.2 24 10.1.1.2
   

2. Configure Router B:

   # Enable frame relay on interface Serial 2/0.

   <RouterB> system-view
   [RouterB] interface serial 2/0
   [RouterB-Serial2/0] link-protocol fr
   

   # Configure an IP address for interface Serial 2/0.

   [RouterB-Serial2/0] ip address 10.1.1.2 24
   

   # Configure interface Serial2/0 to operate in DCE mode.

   [RouterB-Serial2/0] fr interface-type dce
   

   # Configure a frame relay DLCI for interface Serial 2/0.

   [RouterB-Serial2/0] fr dlci 100
   [RouterB-fr-dlci-Serial2/0-100] quit
   [RouterB-Serial2/0] quit
   

   # Enable frame relay on interface Serial 2/1.

   [RouterB] interface serial 2/1
   [RouterB-Serial2/1] link-protocol fr
   

   # Configure an IP address for interface Serial 2/1.

   [RouterB-Serial2/1] ip address 12.1.1.1 24
   

   # Configure interface Serial 2/1 to operate in DCE mode.

   [RouterB-Serial2/1] fr interface-type dce
   

   # Configure a frame relay DLCI for interface Serial 2/1.

   [RouterB-Serial2/1] fr dlci 100
   [RouterB-fr-dlci-Serial2/1-100] quit
   

   # Enable FRF.20 compression on interface Serial 2/1, and configure interface Serial 2/1 to include TCP header compression when performing RTP compression.

   [RouterB-Serial2/1] fr compression iphc
   [RouterB-Serial2/1] fr iphc tcp-include
   

3. Configure Router C:

   # Enable frame relay on interface Serial 2/0.

   <RouterC> system-view
   [RouterC] interface serial 2/0
   [RouterC-Serial2/0] link-protocol fr
   

   # Configure an IP address for interface Serial 2/0.

   [RouterC-Serial2/0] ip address 12.1.1.2 24
   

   # Configure interface Serial 2/0 to operate in DTE mode.

   [RouterC-Serial2/0] fr interface-type dte
   

   # Enable FRF.20 compression on interface Serial 2/0, and configure interface Serial 2/0 to include TCP header compression when performing RTP compression.

   [RouterB-Serial2/0] fr compression iphc
   [RouterB-Serial2/0] fr iphc tcp-include
   [RouterC-Serial2/0] quit
   

   # Configure a static route, setting the destination IP address to 10.1.1.1/24 and next hop IP address to 12.1.1.1.

   [RouterC] ip route-static 10.1.1.1 24 12.1.1.1
   

# Telnet to Router C from Router A.

<RouterA> telnet 12.1.1.2
Trying 12.1.1.2 ...
Press CTRL+K to abort
Connected to 12.1.1.2 ...
******************************************************************************
* Copyright (c) 2004-2009 Hangzhou H3C Tech. Co., Ltd. All rights reserved.  *
* Without the owner's prior written consent,                                 *
* no decompiling or reverse-engineering shall be allowed.                    *
******************************************************************************

# Display FRF.20 compression statistics on Router B.

<RouterB> display fr iphc
Serial2/1 -DLCI:100
  RTP header compression information:
    Compression:
        Total packets:               0 , Packets compressed:               0
        Link searches:               0 , Search missed     :               0
        Bytes saved  :               0 , Bytes sent        :               0
    Decompression:
        Total packets:               0 , Packets compressed:               0
        Errors       :               0
    Compression-connections: 16 , Decompression-connections: 16

  Information of TCP header compression:
    Compression:
        Total packets:              31 , Packets compressed:              28
        Link searches:               0 , Search Missed     :               2
        Bytes saved  :             976 , Bytes sent        :             314
    Decompression:
        Total packets:               0 , Packets compressed:               0
        Errors       :               0
    Compression-connections: 16 , Decompression-connections: 16