mirror of
https://github.com/gnu4cn/ccna60d.git
synced 2024-05-21 04:55:00 +08:00
update
This commit is contained in:
28
d36-EIGRP.md
28
d36-EIGRP.md
@@ -815,4 +815,32 @@ Routing entry for 172.16.100.0/24
|
||||
|
||||
###运用接口的延迟来对EIGRP的度量值计算进行影响
|
||||
|
||||
**Using Interface Delay to Influence EIGRP Metric Calculation**
|
||||
|
||||
接口延迟数值,是用微秒来表示的。但在EIGRP度量值计算中用到的延迟数值,是以10微妙计的(in tens of microseconds)。因此,为了计算出EIGRP的度量值,接口上的延迟数值,就必须除以10。下面的表36.3对思科IOS软件中使用到的默认接口带宽及延迟数值,进行了演示:
|
||||
|
||||
*表 36.3 -- 默认的接口带宽与延迟数值*
|
||||
|
||||
| 接口类型 | 带宽(Kilobits) | 延迟(Microseconds, us) |
|
||||
| -- | -- | -- |
|
||||
| 以太网(Ethernet) | 10000 | 1000 |
|
||||
| 快速以太网(FastEthernet) | 100000 | 100 |
|
||||
| 千兆以太网(GigabitEthernet) | 1000000 | 10 |
|
||||
| 万兆以太网(Ten-GigabitEthernet) | 10000000 | 10 |
|
||||
| 串行线路(T1) | 1544 | 20000 |
|
||||
| 串行线路(E1) | 2048 | 20000 |
|
||||
| 串行线路(T3) | 44736 | 200 |
|
||||
| 串行线路(E3) | 34010 | 200 |
|
||||
|
||||
在对接口的带宽及延迟数值进行计算时,重要的是记住对接口带宽的调整并不会自动地调整到接口的延迟,相反也是这样。这两个数值是相互独立的。比如,下面的输出展示了一个快速以太网接口的默认带宽及延迟数值:
|
||||
|
||||
```
|
||||
R2#show interfaces FastEthernet0/0
|
||||
FastEthernet0/0 is up, line protocol is up
|
||||
Hardware is AmdFE, address is 0013.1986.0a20 (bia 0013.1986.0a20)
|
||||
Internet address is 192.168.1.2/24
|
||||
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
|
||||
reliability 255/255, txload 1/255, rxload 1/255
|
||||
...
|
||||
[Truncated Output]
|
||||
```
|
||||
|
||||
Reference in New Issue
Block a user