Traffic Export
原始 IP 流量导出（RawIP Traffic Export）是一个轻量级的思科 IOS 软件特性，用于将到达到离开网络设备的 IP 数据包导出到外部设备，
IP Traffic Export
。它使用指定的局域网接口来导出所捕获的 IP 数据包。其目标是将原始 IP 数据包以未修改的格式导出到指定设备（比如说数据包分析程序或 IDS 设备）。原始 IP 流量导出的特性包括：
1. 通过过滤功能（使用 ACL），可以只导出感兴趣的流量。
2. 采样选项可以减少流量输出量。
3. 使用与目标主机相关的 MAC、802.1q 或者交换机间链路（Inter-Switch Link，ISL）地址（而不是 IP 地址）来指定执行导出的以太网端口。
4. 当特性激活或禁用时设置 syslog 信息。
Configuration
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Router(config)#iptraffic-export profile CCIE
Router(conf-rite)# interface FastEthernet0/0
Router(conf-rite)# bidirectional
Router(conf-rite)#mac-address 0200.4C4F.4F50
Router(config)#interfaceFastEthernet0/1
Router(config-if)#ip address 192.168.1.1 255.255.255.0
Router(config-if)#ip traffic-export apply CCIE
验证配置
Router#show ip traffic-export
Router IP Traffic ExportParameters
Monitored Interface FastEthernet0/1
Export Interface FastEthernet0/0
Destination MAC address 0200.4c4f.4f50
bi-directional traffic export is on
Output IP Traffic ExportInformation Packets/BytesExported 0/0
Packets Dropped 0
Sampling Rate one-in-every 1 packets
No Access List configured
Input IP Traffic ExportInformation Packets/BytesExported 14/1400
Packets Dropped 0
Sampling Rate one-in-every 1 packets
No Access List configured
Profile CCIE is Active
Snifer设备获取到流量
Frame417: 114 bytes on wire (912 bits), 114 bytes captured (912 bits) on interface 0
EthernetII, Src: 02:00:4c:4f:4f:50 (02:00:4c:4f:4f:50), Dst: 02:00:4c:4f:4f:50(02:00:4c:4f:4f:50)
Destination: 02:00:4c:4f:4f:50(02:00:4c:4f:4f:50)
Source: 02:00:4c:4f:4f:50(02:00:4c:4f:4f:50)
Type: IP (0x0800)
InternetProtocol Version 4, Src: 192.168.1.10 (192.168.1.10), Dst: 192.168.1.1(192.168.1.1)
Version: 4
Header Length: 20 bytes
Differentiated Services Field: 0x00 (DSCP0x00: Default; ECN: 0x00: Not-ECT (Not ECN-Capable Transport))
Total Length: 100
Identification: 0x0011 (17)
Flags: 0x00
Fragment offset: 0
Time to live: 254
Protocol: ICMP (1)
Header checksum: 0x392c [correct]
Source: 192.168.1.10 (192.168.1.10)
Destination: 192.168.1.1 (192.168.1.1)
[Source GeoIP: Unknown]
[Destination GeoIP: Unknown]
InternetControl Message Protocol
Type: 8 (Echo (ping) request)
Code: 0
Checksum: 0xeefd [correct]
Identifier (BE): 5 (0x0005)
Identifier (LE): 1280 (0x0500)
Sequence number (BE): 0 (0x0000)
Sequence number (LE): 0 (0x0000)
Data (72 bytes)
使用ACL过滤流量
Router(config)#ip access-listextended telnet
Router(config-ext-nacl)#permittcp any any eq telnet
Router(config)#ip traffic-exportprofile CCIE
Router(conf-rite)#interfaceFastEthernet0/0
Router(conf-rite)#incomingaccess-list telnet
Router(conf-rite)#mac-address0200.4C4F.4F50
Router(config)#interfaceFastEthernet0/1
Router(config-if)# ip address192.168.1.1 255.255.255.0
Router(config-if)# iptraffic-export apply CCIE
验证配置
Router#show ip traffic-export
Router IP Traffic ExportParameters
Monitored Interface FastEthernet0/1
Export Interface FastEthernet0/0
Destination MAC address 0200.4c4f.4f50
bi-directional traffic export is on
Output IP Traffic ExportInformation Packets/BytesExported 0/0
Packets Dropped 0
Sampling Rate one-in-every 1 packets
No Access List configured
Input IP Traffic ExportInformation Packets/BytesExported 45/1865
Packets Dropped 115
Sampling Rate one-in-every 1 packets
AccessList telnet [named extended IP]
Profile CCIE is Active
http://www.cisco.com/c/en/us/td/docs/ios/12_4t/12_4t11/ht_rawip.html