路由器和交換機的接口命名含義

來源 https://networkengineering.stackexchange.com/questions/18983/what-does-the-notation-f0-0-and-f0-1-mean-in-this-diagram/18987#18987

 

The notation is denoting that there are multiple NIC interfaces on the router in the diagram and it's making reference to this.

• F0/0 - interface #1
• F0/1 - interface #2

NOTE: The F indicates that the NIC/port is most likely a Fast Ethernet type of connection.

This diagram from the Cisco website shows them as well. Here's the referenced as Fa 0/1, which I believe is the more typical notation.

 

The other interesting take away is that the notation may sometimes include a 3rd digit to denote that the interface being referenced is not built into the Motherboard of the networking gear. The above diagram shows some examples of this, ie. T1 1/0/1. NOTE: The 3rd digit prefixes, and indicates which "slot" on the Motherboard a port is coming from.

Again the Cisco reference describes these slots like so:

 

I was also able to dig up this reference: Interface Nomenclature Guide of Router and Switch which describes the reference of F0/0 like so. Take note that there are 2 types of situations:

• Fixed interface series router
• Modular interface series router

This notation was originally used for fixed types of routers:

In fixed interface series router, the interface nomenclature is type slot_#/ port_#.

But with the advent of modular routers, that did not denote which addon card (WIC) was being referenced. So the notation was expanded:

• New naming convention only for WIC slots (WAN Interface Card) is type slot_#/subslot_#/ port_#.
• Ports installed directly on chassis still use classic convention that is type slot_#/ port_#.

Incidentally that same site had this table which describes the F0/0 notation like this:

 

Additional searches did turn up this URL: Standard Router Ports which had these types of ports listed:

• Aux port: This auxiliary port is used to connect a modem to the router, which can then be used to remotely modify the configuration on the router.
• Attachment Unit Interface (AUI) port: Before the WIC became a standard for providing expansion through an add-on port, the AUI allowed transceivers to be used, providing you with the ability to add various types of network connections, such as fiber or copper Ethernet connections.
• Serial: Connects a modem or other serial device to allow a WAN network interface to be used on the router.
• Ethernet/Fast Ethernet/Gigabit Ethernet: Standard network interfaces used to connect different network segments.
• Console: Serial configuration port for command-line access to router management and configuration. Refer to Figure 3-1 to see the console port.
• WAN Interface Card (WIC) port: Because a wide variety of WAN connectivity options are available (for example, T1, ISDN, ADSL), you can use this port to add different interfaces to a standard router.
• Hardware WAN Interface Card (HWIC) port: With the integration of services into routers, the WIC interface became too limiting. The HWIC interface was created to support a wider variety of hardware expansion options, such as switches and service cards. This port is backward compatible with most older WIC hardware.

As well as this URL: Different types of interfaces in a Cisco Router:

• Ethernet - Ethernet is typically Ethernet IEEE 802.3 standard based physical interface, which operates at 10 Mbps speed. The media standard used is 10BaseT.
• Fast Ethernet - Fast Ethernet is typically Ethernet IEEE 802.3u standard based physical interface which operates at 100 Mbps speed. The media standard used is 100BaseT.
• Gigabit Ethernet - Gigabit Ethernet is typically Ethernet IEEE 802.3ab standard based physical interface which operates at 1000 Mbps speed. The media standard used is 1000BASE-T
• Serial - Serial interfaces are typically used for WAN connections from ISP (Internet Service Providers) for connectivity types like Frame Relay, T1, T3, etc.
• FDDI Fiber Distributed Data Interface - FDDI networks operates at 100 Mbps speed and uses a token-passing mechanism to prevent collisions.
• Token Ring - Token Ring interfaces can operate at either 4 Mbps or 16 Mbps. In Token Ring networks a token is passed around the network (configured in ring topology), allowing the owner of the token to transmit a frame, to avoid collision.Token Ring networks vanished from networking industry long way back. New Cisco routers do not have a Token Ring interface.

Note: Only 10Mbps Ethernet interface has a name "Ethernet" in a Cisco Router. A 100Mbps Ethernet interface is called a "FastEthernet" interface and a 1000Mbps Ethernet interface is called a "GigabitEthernet" interface.

That last bit is a bit more telling. Since Ethernet would historically been used for 10MBps interfaces, the "F" in my "F0/0" & "F0/1" diagram would seem to imply that the interface is a FastEthernet capable connection (10/100MBps).

However, more recently, Ethernet can also be used interchangeably on Gigabit Ethernet as well as 10G Ethernet ports, so you need to pay special attention to the actual equipment that's been referenced by a diagram.

References

• Interface and Line Numbers in Cisco 1800, 2800 and 3800 Series Routers
• Standard Router Ports
• Different types of interfaces in a Cisco Router

 

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該符號表示圖中的路由器上有多個NIC接口，並且正在對此進行引用。

• F0 / 0-接口＃1
• F0 / 1-接口＃2

注： F表示NIC /端口很可能是快速以太網類型的連接。

思科網站上的此圖也顯示了它們。這里稱為Fa 0/1，我相信這是更典型的表示法。

 

另一個有趣的收獲是，該符號有時可能包含第三個數字，以表示所引用的接口未內置在網絡設備的主板中。上圖顯示了一些示例。T1 1/0/1。注意：第3位數字前綴，表示端口來自主板上的哪個“插槽”。

再次，Cisco參考描述了這些插槽，如下所示：

 

我也能夠找到該參考文獻：《路由器和交換機的接口命名指南》，像這樣描述了F0 / 0的參考文獻。請注意，有兩種情況：

• 固定接口系列路由器
• 模塊化接口系列路由器

此符號最初用於固定類型的路由器：

在固定接口系列路由器中，接口名稱為 類型 槽位 _＃/ 端口_＃。

但是隨着模塊化路由器的問世，這並不表示正在引用哪個附加卡（WIC）。因此，表示法進行了擴展：

• 僅對於WIC插槽（WAN接口卡）的新命名約定是 類型 槽位 _＃/ 子槽位 _＃/ 端口_＃。
• 直接安裝在機箱上的端口仍為 類型 槽位 _＃/ 端口_＃ 的經典約定。

順便說一句，同一站點具有此表，該表描述了這樣的F0 / 0表示法：

 

其他搜索確實打開了以下URL：標准路由器端口，其中列出了以下類型的端口：

• 輔助端口：此輔助端口用於將調制解調器連接到路由器，然后可用於遠程修改路由器上的配置。
• 附件單元接口（AUI）端口：在WIC成為通過附加端口提供擴展的標准之前，AUI允許使用收發器，從而使您能夠添加各種類型的網絡連接，例如光纖或銅纜以太網連接。
• 串行：連接調制解調器或其他串行設備，以允許在路由器上使用WAN網絡接口。
• 以太網/快速以太網/千兆以太網：用於連接不同網段的標准網絡接口。
• 控制台：串行配置端口，用於命令行訪問路由器管理和配置。請參閱圖3-1，查看控制台端口。
• WAN接口卡（WIC）端口：由於有多種WAN連接選項可用（例如T1，ISDN，ADSL），因此您可以使用此端口向標准路由器添加不同的接口。
• 硬件WAN接口卡（HWIC）端口：隨着將服務集成到路由器中，WIC接口變得過於局限。HWIC接口的創建旨在支持各種硬件擴展選項，例如交換機和服務卡。該端口與大多數較舊的WIC硬件向后兼容。

以及以下URL：Cisco路由器中的不同類型的接口：

• 以太網 -以太網通常是基於以太網IEEE 802.3標准的物理接口，其運行速度為10 Mbps。使用的媒體標准是10BaseT。
• 快速以太網 -快速以太網通常是基於以太網IEEE 802.3u標准的物理接口，其運行速度為100 Mbps。使用的媒體標准是100BaseT。
• 千兆以太網 -千兆以太網通常是基於以太網IEEE 802.3ab標准的物理接口，其運行速度為1000 Mbps。使用的媒體標准是1000BASE-T
• 串行 -串行接口通常用於ISP（Internet服務提供商）的WAN連接，以實現幀中繼，T1，T3等連接類型。
• FDDI光纖分布式數據接口 -FDDI網絡以100 Mbps的速度運行，並使用令牌傳遞機制來防止沖突。
• 令牌環 -令牌環接口可以以4 Mbps或16 Mbps的速度運行。在令牌環網絡中，令牌在網絡中傳遞（以環形拓撲配置），從而令牌的所有者可以傳輸幀以避免沖突。令牌環網絡從網絡行業中消失了很長時間。新的Cisco路由器沒有令牌環接口。

注意：在Cisco路由器中，只有10Mbps以太網接口的名稱為“以太網”。100Mbps以太網接口稱為“ FastEthernet”接口，而1000Mbps以太網接口稱為“ GigabitEthernet”接口。

最后一點更具說服力。由於以太網過去一直用於10MBps接口，因此在我的“ F0 / 0”和“ F0 / 1”圖中，“ F”似乎暗示該接口是支持FastEthernet的連接（10 / 100MBps）。

但是，最近，以太網也可以在千兆位以太網和10G以太網端口上互換使用，因此您需要特別注意圖中引用的實際設備。

參考文獻

• Cisco 1800、2800和3800系列路由器中的接口和線路號
• 標准路由器端口
• 思科路由器中的不同類型的接口

 

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