IS-ISPackets-创新互联
In ISO terminology, packets are referred to as Protocol Data Units (PDUs). There are 3 categories of IS-IS packets:
The following table shows IS-IS packet types:
Generic IS-IS Packet Header
Each IS-IS PDU mentioned in above table has an 8-byte header. The following packet capture shows the basic format:
本文题目：IS-ISPackets-创新互联
本文地址：http://hbruida.cn/article/ccepdh.html
- IS-IS Hello Packets (IIHs): These packets establish and maintain adjacencies between IS-IS neighbors.
- Link State PDUs (LSPs): These packets are responsible to distribute routing information between IS-IS nodes.
- Sequence Number PDUs (SNPs): These packets control the distribution of LSPs. SNPs provide mechanism to synchronize LSDBs between routers in the same area.
The following table shows IS-IS packet types:
| Category | Packet Type | Type Number |
| Hello | LAN Level-1 Hello | 15 |
| LAN Level-2 Hello | 16 | |
| Point-to-point Hello | 17 | |
| LSP | Level-1 LSP | 18 |
| Level-2 LSP | 20 | |
| SNP | Level-1 Complete SNP | 24 |
| Level-2 Complete SNP | 25 | |
| Level-1 Partial SNP | 26 | |
| Level-2 Partial SNP | 27 |
Generic IS-IS Packet Header
Each IS-IS PDU mentioned in above table has an 8-byte header. The following packet capture shows the basic format:
另外有需要云服务器可以了解下创新互联scvps.cn，海内外云服务器15元起步，三天无理由+7*72小时售后在线，公司持有idc许可证，提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案，具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势，专为企业上云打造定制，能够满足用户丰富、多元化的应用场景需求。
成都创新互联公司是一家专业提供华宁企业网站建设,专注与成都网站制作、网站设计、HTML5、小程序制作等业务。10年已为华宁众多企业、政府机构等服务。创新互联专业网站建设公司优惠进行中。本文题目：IS-ISPackets-创新互联
本文地址：http://hbruida.cn/article/ccepdh.html
