![Interface and Line Numbers in Cisco Routers - DavidontheCloud.com - David Papkin Technical Resources Interface and Line Numbers in Cisco Routers - DavidontheCloud.com - David Papkin Technical Resources](https://www.cisco.com/c/dam/en/us/support/docs/routers/3725-multiservice-access-router/62611-62611b.gif)
Interface and Line Numbers in Cisco Routers - DavidontheCloud.com - David Papkin Technical Resources
Refer to the exhibit. The command _show interface serial 1/0 is issued on the Router _R4, for some reason the physical line is up, but there is no connectivity between both routers.
![static routing configuartion on cisco router using serial port. | Learn Linux CCNA CEH IPv6 Cyber-Security Online static routing configuartion on cisco router using serial port. | Learn Linux CCNA CEH IPv6 Cyber-Security Online](https://linuxtiwary.files.wordpress.com/2015/03/staic-routing-using-serial-port.png?w=640)
static routing configuartion on cisco router using serial port. | Learn Linux CCNA CEH IPv6 Cyber-Security Online
![Verify Connectivity of Directly Connected Networks (1.1.4) > Cisco Networking Academy's Introduction to Routing Concepts | Cisco Press Verify Connectivity of Directly Connected Networks (1.1.4) > Cisco Networking Academy's Introduction to Routing Concepts | Cisco Press](https://www.ciscopress.com/content/images/chap1_9781587133237/elementLinks/01fig17.jpg)
Verify Connectivity of Directly Connected Networks (1.1.4) > Cisco Networking Academy's Introduction to Routing Concepts | Cisco Press
![routing - What does the notation F0/0 and F0/1 mean in this diagram? - Network Engineering Stack Exchange routing - What does the notation F0/0 and F0/1 mean in this diagram? - Network Engineering Stack Exchange](https://i.stack.imgur.com/VWfe6.png)
routing - What does the notation F0/0 and F0/1 mean in this diagram? - Network Engineering Stack Exchange
![routing - What does the notation F0/0 and F0/1 mean in this diagram? - Network Engineering Stack Exchange routing - What does the notation F0/0 and F0/1 mean in this diagram? - Network Engineering Stack Exchange](https://i.stack.imgur.com/cALxm.png)
routing - What does the notation F0/0 and F0/1 mean in this diagram? - Network Engineering Stack Exchange
![How to Configure Cisco Router Interfaces (FastEthernet and Serial Interfaces)-Cisco Certifications – UPaae How to Configure Cisco Router Interfaces (FastEthernet and Serial Interfaces)-Cisco Certifications – UPaae](http://upaae.com/wp-content/uploads/2016/08/config-interface-3.jpg)
How to Configure Cisco Router Interfaces (FastEthernet and Serial Interfaces)-Cisco Certifications – UPaae
![How to Configure Cisco Router Interfaces (FastEthernet and Serial Interfaces)-Cisco Certifications – UPaae How to Configure Cisco Router Interfaces (FastEthernet and Serial Interfaces)-Cisco Certifications – UPaae](http://upaae.com/wp-content/uploads/2016/08/config-interface-2.jpg)
How to Configure Cisco Router Interfaces (FastEthernet and Serial Interfaces)-Cisco Certifications – UPaae
![How to Configure FastEthernet / Serial Interface of Cisco Router with GNS3 | SYSNETTECH Solutions - YouTube How to Configure FastEthernet / Serial Interface of Cisco Router with GNS3 | SYSNETTECH Solutions - YouTube](https://i.ytimg.com/vi/ZEtpoaQ-Hak/maxresdefault.jpg)