How hop count in a local area network works?

I have a network laid out similar to this:

Router A (LAN Port) -> Switch -> Router B (WAN Port)

A PC is connected to the LAN side of each router. PC 1 is on Router A, PC 2 is on Router B. IP Addresses are below:

Router A (LAN): 192.168.1.1
Router B: 192.168.1.2
PC 1: 192.168.1.10
PC 2: 192.168.1.25

When I run a traceroute between the PCs, I only see one hop - the destination PC. However, I'm expecting that I should see two - the destination PC and Router B. Why is there not a second hop in the output?

DHCP is enabled on both routers. OUTPUT of ifconfig on both PC's are. I am working in a Linux environment. PC-1

wlan0     Link encap:Ethernet  HWaddr 54:35:30:2b:d9:99  
          inet addr:192.168.1.10  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::5635:30ff:fe2b:d999/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:30098 errors:0 dropped:0 overruns:0 frame:0
          TX packets:22554 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:10359238 (10.3 MB)  TX bytes:2881707 (2.8 MB)

PC-2

wlan0     Link encap:Ethernet  HWaddr 54:35:30:2b:d9:99  
          inet addr:192.168.1.25  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::5635:30ff:fe2b:d999/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:30098 errors:0 dropped:0 overruns:0 frame:0
          TX packets:22554 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:10359238 (10.3 MB)  TX bytes:2881707 (2.8 MB)

Sanket

Posted 2014-07-22T14:51:08.890

Reputation: 133

1We need more details. Can you explain exactly how the routers and switch are attached? Like which ports are you using on the routers (WAN vs LAN)? – Ƭᴇcʜιᴇ007 – 2014-07-22T15:00:26.547

In addition, could you post the output of traceroute/tracert? – mtak – 2014-07-22T15:01:06.613

Switch is connected to router A's LAN port and router B's WAN port is connected to switch port. – Sanket – 2014-07-22T15:07:26.540

Wait, what? Router B is connected to its own WAN port? – Iszi – 2014-07-22T15:07:55.887

Not Its own but Switch port. – Sanket – 2014-07-22T15:09:59.543

Ok, now I'm really confused. Is it Router A (LAN Port) -> Switch -> Router B (WAN Port) or Router A (LAN Port) -> Switch -> Router B (LAN Port). Also, is Router B configured in "bridge mode"? – Iszi – 2014-07-22T15:11:21.507

Router A (LAN Port) -> Switch -> Router B (MODEM Port) I don't know what is modem port. – Sanket – 2014-07-22T15:14:14.667

Ok. There's some key detail missing here. Please provide the IP addresses for each of the network interfaces in question here (Router A LAN, Router B WAN & LAN, PCs 1 & 2). Also, a copy of the output for ipconfig from each PC, and a copy of the output for a tracert from one PC to the other would be useful. Please edit these details into the question, instead of a comment. – Iszi – 2014-07-22T15:17:23.203

Router A 192.168.1.1 Router B 192.168.1.2 PC-1 192.168.1.10 PC-2 192.168.1.25 Command executed :- traceroute -n 192.168.1.25 OUTPUT###### traceroute to 192.168.1.25 (192.168.1.25), 30 hops max, 60 byte packets 1 192.168.1.25 43.045 ms 44.679 ms 44.735 ms – Sanket – 2014-07-22T15:19:05.167

Which side of the network is the IP for Router B on - WAN or LAN? Also please provide ipconfig output for each PC. – Iszi – 2014-07-22T15:30:24.157

@Sanket I've edited the IP information and other details into the question for you. Please provide further clarification (i.e.: ipconfig outputs, interface location for 192.168.1.2, other IP of Router B) via edit to the question instead of further comment. – Iszi – 2014-07-22T15:34:38.670

How hop count in a local area network works?

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