How To Subnet A Serial Interface
Sep 7, 2011IP Address : 192.168.1.0 /24
I need 50 hosts
I need to subnet for f 0/0 and s 0/0
I know for f 0/0 its 192.168.1.1 /26, but after hours and hours i can't seem how to subnet for the s 0/0
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Protocols / Routing :: Serial Interface Not Working
Sep 18, 2012I just recently bought a new Cisco 2611 for my home lab and am having trouble getting the serial port to work. I have tried multiple things such as erase startup, switching the cables to rule them out, and even changing IP addresses but none worked. [code]
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Apr 28, 2012I have a remote site that still utilizes a single T1 connection to me. For multiple reasons we had to scrap the old T1 and have a new one put in. The old T1 resided on a T3 as channel 25. The new T1 is a standlone point to point. I removed the old config from my 7301 and programmed my 3725. I cannot figure out what is going on but the interface stays down/down. There is no loopback turned on, either manually or by the carrier. The AL LED stays amber regardless of whether or not I have a cable patched down. The CD LED remains green when I patch a cable down. LP is not light.I am using a straight through Ethernet cable to connect my 3725 to the smart jack. If you look at the show output below you will see DCD and CTS is down. Since the remote end was working and I just had the tech move the patch cable from one smart jack to another I am assuming the problem is on my side or with the carrierI already tried changing the clock sourced between internal and line. I also swapped out the WIC card for another one. I don't usually program T1 connections. [code]
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Feb 11, 2013We have a Cisco 1760 router . We are facing sevier packet drops in the serial interface.
When i swap the router with another router link is working working fine.
Troubleshooting steps taken
1. Swap the serial cable with another working cable : no change in state
2. Reconfigure the encapsulation commands (with PPP and HDLC) : no change in state
3. Try with a decreased MTU packet Ping : no change in state
4. Decreased the Input queue and increased the output queue size using hold-queue in command : Comparatively the packet drop is reducing but still a 10 percent drop is happening.
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Feb 24, 2013What would cause an interface to show up/up (looped), but you still can't ping that loop?...It is on a Cisco 7613 with an Enhanced FlexWan (WS-X6582- 2PA), with a Mx Serial PA, 8 ports (73-1580-10) and running IOS ver 12.2(33)SRE2 [code]
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May 16, 2013I'm having an issue that I can't quite understand. I set up a test lab to get familiar with EIGRP routing. I have a Cisco 3845-MB with 2 VWIC2-2MFT-T1/E1 cards.sh ip int brief shows UP UP status on all serial ports. I gave it an IP address but I'm having trouble pinging the serial interface IP. It's dropping pings to its own S 1/1/0 interface when pinging from console. I have known good T1 crossover cables 1&2 - 4&5.
Here is the "ip int brief" from 3845-MB
3845-MB#sh ip int brief
Interface IP-Address OK? Method Status Prot
ocol
GigabitEthernet0/0 unassigned YES NVRAM administratively down down
GigabitEthernet0/1 172.30.2.1 YES NVRAM up up
Serial1/1/0:0 10.3.29.2 YES manual up up
Right now it's pinging itself at about 60 -90% success rate... and I can't figure out why it's dropping any packets at all. I have other issues with in the lab as well... but i think this might be my "core" issue.To make matters even more "weird" I've tried two different VWIC2-2MFT-T1/E1 cards and I drop pings with both of them.
Here is a sh run and a sh diag:
3845-MB#sh run
Building configuration...
Current configuration : 1434 bytes
!
version 12.4
service timestamps debug datetime msec
[code].....
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Apr 29, 2012I am trying to use the connected WIC2-2MFT, as the servial interface on my cisco 1841.But it does not show me the option, under configuration interface
[code] What should I do to make this enable on this list?I am attaching the show tech-support, and show version of this device.
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Mar 26, 2012I have existing cisco 2811 (Version 12.4(3c)). I try to add a HWIC serial card into the router but the new HWIC is not detected. There is no new interfece shows up when i do show run. This HWIC is a new card just bought it.
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Oct 22, 2012While I managed to connect to each router individually, I decided it was time to connect the routers together via serial; as I don't have any serial cables and need to buy some, what serial cables I need, as well as to ask whether I have the right cards in my router(s) that will allow me to do so.
I bought 3 1841 routers, and all have a 1 port serial WAN Interface Card (WIC 1-T); one router has 2 of these, and one router has a WIC-1B-S/T .. My question is, can I connect the routers with a serial cable via WIC 1-T, or do I need a 2-T
Cisco Switching/Routing :: PPP Multilink Not Coming Up On Serial Interface / 3620 Router?
Nov 1, 2011I just finished setting up a bundle of (2) T1's in a multilink bundle and I'm having issues with one of the T1's not wanting to join the bundle.
The router I'm using on the remote office location is a 3620 router running code c3620-i-mz.121-1c.bin
The campus router which is a 7206 is setup the same exact way with multilink 240 and like I've said, serial 0/0 is joined to the bundle just fine, so we are running off one T1 connection.
The serial interface that is not working is: serial 0/1
Here is a show-run:
interface Multilink240
ip address 172.18.xxx.xxx 255.255.255.252
ip route-cache flow
ip ospf network point-to-point
service-policy output PhonesFirst
ppp multilink
[code].....
Cisco Switching/Routing :: SG 200-26P Cannot Access Web Interface From Different Subnet
May 24, 2012Got a shiny new SG 200 26P which seems to work fine operationally.owever, when I am trying to access the web interface from a different IP subnet, the web brower just times out.If I put my PC on the same IP subnet, it works just fine. From the other subnet, I can ping the switch fine. The default gateway is set on the switch, and from the web interface I can ping and dns resolve other hosts and on the internet. I've tried to create a management profile to 'allow all from everywhere' basically, but still no luck.I'm completely stumped. I've tried to reset to firmware defaults, and I'm now runinng the latest firmware. I woudl suppose that the switch would allow itself to be managed via the web interface from all subnets by default. Any thoughts? The fact that the switch can ping internet hosts makes be believe it's own default gateway and IP are all ok and working.. (and I can ping it from anywhere in my network).
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version 15.2
no service pad
service timestamps debug datetime msec
[Code].....
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Aug 12, 2012I have got a wireless project with WLC main office and have 10 sites where ap's are there and ap's getting registerd .we need 4 ssid in all branches same .
ssid guest
ssid scanner
ssid user
vlan 600 main office for scanner 192.168.1.0
in branch
vlan 600 for scanner but ip is 172.16.1.0
and bgp is running . And customer is asking me not to edit the ip range or vlan or create new vlan . but in wlc am not able to create branch network 172.16.1.0 range interface and vlan 600 as vlan 600 i already created for scanner main office 192.168.1.0 So is there a way to do that .
Temprarly one site i did like created vlan 610 in branch no ip . And in main office interface vlan 610 given another ip range . and i created interface in wlc . from branch i can connect the ssid and getting ip . But they dont want to create any aditional vlan or another network . Customer dont have a smartnet contract . They recently baught 2 wlc 5508 and 40 ap 1142.
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