Cisco Switching/Routing :: 3560CG Switch Terminate On Internet Modem
Feb 4, 2013
I am facing with Cisco 3560CG Switch. We have a Cisco WS-C3560CG-8PC-S (Cisco Catalyst 3560-C Switch, 8 GE PoE, 2 dual-purpose uplinks, IP Base image) switch which will be a core switch and the internet link from the ISP is terminated on a Modem. The ISP configured the internet modem and provided the details such as Gateway IP, Subnet Mask, DNS IP address, Usable IP Address Block, to configure the switch, where ew have connacted the Modem. When, I verified the details, there were only 4 IP addresses available under Usable IP address block. Spoke with the ISP and they confirmed that they cannot increase the IP Addresses (some limitation on the Modem) in the pool and we have to do NATing at the switching (Which we can't do, because of IP Base image limitation). About the network, it will be a flat network with only one VLAN which is used for Wireless Guest Access.
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Mar 19, 2012
we using Linksys router for Internet for different vlans now we take 3750 as core switch for another different vlans 10,20 we create v Lans 20,20 also create cpd servers and we need Internet for vlans 10,20 through linksys router how should we configure?
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Sep 4, 2012
I got some specs here that I can't seem to match with any existing switch - unless the 350CG-8PC-S can be powered by PoE.Let me quickly put down the important specs.
8x Gigabit ports
2x 1G Copper or 1G SFP Uplinks (It'll be a 1x Copper and 1x SFP setup)
support for PoE passthrough ( so just capable of it, provided it's 2x Copper Uplinks )
Does that match the 350CG-8PC-S ?
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Oct 11, 2011
When will Cisco release the IOS release 15 for Catalyst 3560CG? We need it because of the critical voice feature (authentication event server dead action authorize voice) for 802.1x.
Actually only release 12.2(55)EX3 is available for the 3560CG-8PC-S models. The funny part is that for older 3560-12PC-S models there is release 15 already available.
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Apr 10, 2012
I tried to put QoS in a WS-C3560CG-8TC-S version 12.2(55)EX2.It shows 0 traffic in class-map. Here is the config My question is why I can not see the traffic via class-map?it should in the default Q if incorrect mark.I erased the config and config with the autoQoS, shows the same result.
class-map match-any VoIP description Voice IP Phone RTPmatch access-group 157
class-map match-any WEB description Internal Web, SSL Web, DNS query, Pinnaclematch access-group 153
!
policy-map QOSMARK
class VoIP set dscp ef
class WEB set dscp cs3
class class-default set dscp default
[code].....
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Mar 30, 2013
I have a number of 3560CG-8PC-S switches. My intention for them is to act as kind of gateway L3 switches - one for each satellite site. My thinking was simply to have an L3 device at the gateway to each of those sites so that any inter-vlan traffic within each site can stay within the site rather than having to traverse the relatively slow radio links to get back to the 3750X stack in the core. They are also, however, going to be directly serving client devices
My issue is that for some reason, when connecting a new device (laptop etc) to one of the access ports on the 3560's, the port behaves as if it's being blocked. No DHCP addresses go through, the indicator remains orange, and the clients have no connectivity. However, if I wipe the config, I get a VLAN 1 IP address for my client no problems at all. And to make matters more confusing, only two out of my four 3560's are doing this. The other two have exactly the same config, but work perfectly.To that end, I'm loading the config below. I've followed that by the show running-config output, and show ip interface brief outputs.
configure terminal
hostname ASW34
!
enable secret *RuT1l3&
service password-encryption
username xxxx password xxxx
[code].....
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Sep 9, 2012
Uhg. I deployed a 3560G a week ago and it was crashing... so I replaced it Sep 7 around 16:00 and now this one is crashing. Different logs.
Version 12.2(55)EX3
Sep 6 18:06:08: %PLATFORM-1-CRASHED: Debug Exception (Could be NULL pointer dereference) Exception (0x2000)!
Sep 6 21:05:18: %PLATFORM-1-CRASHED: Data TLB Miss Exception (0x1100)!
Sep 7 04:12:43: %PLATFORM-1-CRASHED: Debug Exception (Could be NULL pointer dereference) Exception (0x2000)!
Sep 7 05:35:09: %PLATFORM-1-CRASHED: Debug Exception (Could be NULL pointer dereference) Exception (0x2000)!
Sep 7 08:21:37: %PLATFORM-1-CRASHED: Data TLB Miss Exception (0x1100)!
Sep 7 11:13:18: %PLATFORM-1-CRASHED: Data TLB Miss Exception (0x1100)!
Replacement Version 12.2(55)EX2
Sep 7 16:34:48: %PLATFORM-1-CRASHED: Debug Exception (Could be NULL pointer dereference) Exception (0x2000)!
Sep 8 03:39:38: %PLATFORM-1-CRASHED: Data TLB Miss Exception (0x1100)!
Sep 8 18:26:06: %PLATFORM-1-CRASHED: Data TLB Miss Exception (0x1100)!
Sep 9 18:14:38: %PLATFORM-1-CRASHED: Debug Exception (Could be NULL pointer dereference) Exception (0x2000)!
More detailed syslogs are in the attaced 'crash-logs.txt' file.
The device is running OSPF (it is in an NSSA). I have several other devices configured almost the same running the same IOS in my network and they are working fine.This does make the third out-of-box 3560C Cisco that has failed on me within a few days.
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Jul 12, 2012
I'm seeing very high CPU usage on my new 3560CG-8-PC switch. It's at 61%. How to chase down what's causing it?
I'm seeing a lot of rpf-fail drops. What causes them? How to prevent?
Supervisor TxQueue Drop Statistics
Queue 0: 0
Queue 1: 0
[Code].....
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Nov 3, 2011
I recently ordered and received Cisco Catalyst 3560-CG Series 8-port PoE switches (ws-C3560CG-8PC-S). In running the Cisco Network Assistant (Version 5.6(3)) they show up as an unsupported device. The documentation for this product indicates that you can use CNA to configure this switch. Is there a download or patch available to correct this problem?
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May 19, 2013
I am unable to connect a Wifi Modem wiith 2960 Switch having VLAN 1,Attached is the network diagram,what configurations i have to modified it,I need to Connect A Wifi Modem on VLAN 1 ,Connectivity is working fine between VLAN 10 and VLAN 1.What should be the next step to Connect Wifi Modem to VLAN 1 so that Users on VLAN 10 should connect to Internet.
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Sep 8, 2012
I am with Virgin media and have a home lab (2611 routers, 3550 switches, 2950s etc) which i usually just use for testing things on and practicing.
Now I tried to connect it to the internet and got some weird things happening.
I got NAT and DHCP client all setup correctly on the router (or so I think!) along with DNS settings but I still can't get Internet access.
My network is all setup right so that through using OSPF the router is the gateway (0.0.0.0 route) for all devices. Doing a traceroute confirms this.
Yet I never get any further than the router? I see IP nat translations ticking up as I send more requests but never get a webpage or a reply from any of the machines in my network.
HOWEVER... The router itself does get some replies from Google.co.uk and bbc.co.uk but doesn't seem to want to give anything else on the "inside" a response?
Here is a dump of config:
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
[Code].....
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Oct 1, 2012
I am having an issue with my network that has me perplexed. I have a DPC3010 cable modem (Charter internet). I previously had it connected to a Linksys WRT54GL with DD-WRT installed and that was working OK except that I had to reboot it 2-3 times per week. I replaced it with a Cisco 861 (non-wireless) router and it worked OK for a few hours then it started dropping the internet connection (it goes up and down constantly). If I switch back to the Linksys everything works fine again. I am using the same cables in either case so I know it's not a cabling issue. I upgraded the firmware to c860-universalk9-mz.151-4.M3.bin, but it made no difference. I was starting to suspect a problem with the physical ports on the router, but I decided to try connecting the 861 behind the Linksys and turns out it works fine in that setup.
So to recap...
If I connect the 861 directly to the modem my internet connection bounces up and down
If I connect the Linksys directly to the modem my internet connection is fine
If I connect the Linksys directly to the modem and the 861 to the Linksys everything works fine (my PC is connected to the fe0 port of the 861)
Are the 861 and the modem simply incompatible or is it a configuration issue? I have attached my 861 config to this thread.
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Aug 4, 2012
I have a 5510 with me. I want to terminate two Internet links on that. The primary Internet Leased Line to access my DC network using Site-to-Site VPN, and the secondary ADSL connection to access my other location network via VPN and and for web browsing. How can I achieve these goals.
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Jan 2, 2013
I have a problem with my switch. The model no. of the switch is as follows:
Linksys SRW2048 10/100/1000 48 Ports
Serial No: RJT00GC00395 GGR2906 MM
1. I am creating a home computer lab. I do have 3 servers HP ProLiant DL 385 G1. Two of them have 6 gigabit ports where as the third server has 2 gigabit ports.
2. Installed ESXi 5.1 on two servers where as installed FreeNAS on the third server and configured it as iSCSI storage and NFS storage.
Problem:
1. Every port works perfectly fine. However, when I keep connecting the ports of the switch to the ports of servers, internet gets disconnected.
2. Interestingly, my wireless internet also gets disconnected, the ports of the switch does not have any internet now.
3. This happens till I connect above 8-9 ports of the switch to the servers.
3. However, when I remove the connection between the switch and the servers, internet comes, wireless internet starts working; and the port of the switch also gets internet connection when I check the internet connection of the individual ports one at a time.
Some more information:i do have internet service provided by Time Warner Cable. My internet speed is as follows:
Download Speed: Up to 15 Mbps
Upload Speed: Up to 1 Mbps
I do have a modem *** router by Motorola which has 4 gigabit ports.Model no: Motorola SURFboard SBG6580 i am assuming it is some thing related to bandwidth of the internet.
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Feb 22, 2012
I have a small cisco switch cluster (seven different 2924, 3524cisco switches) with 3550 as a cluster control which does all the inter vlan routing that works fine.
This cluster is in semi production PBX interop testing lab. This is a closed network without internet access and not connected to our corporate network.However now I have to add this capability so some equipment in the lab can get Microsoft updates over the internet.
I've created a port on a 3550 (fa0/19) and connected it to another network that has internet access. It picked an ip address and when I'm logged in to the 3550 I can ping hosts on the outside network. However I can't ping any hosts on that network from any hosts that are connected to my vlans.I've tried a few different things, but still can't make it to work.
Here is a short version of my 3550 configuration:
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log datetime
no service password-encryption
[code]....
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Jan 25, 2012
i'm already has one internet connection is conecting directily to the Core Switch 6509, and the Switch is route any internet request with default route:
SW6509-conf)# ip route 0.0.0.0 0.0.0.0 10.170.10.10
10.170.10.10 is --> Next hop for the DSL router internal IP, and it's working fine.
We have a new internet connection with another ISP/ with another DSL router, how to connect both of them to exit from the Core Switch 6509.
is it ok if i make another default route to the Next hop to the new DSL router as:
SW6509-conf)# ip route 0.0.0.0 0.0.0.0 10.80.10.10
10.80.10.10 is --> Next hop for the new DSL router internal IP.
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Nov 16, 2011
I have router connected to 2 3550 switches directly. 3550A and B switches are running HSRP. OSPF is running between Router and 2 switches.
From Switch B i can ping the Router Wan interface but not the internet sites. from Switch A i can ping any sites?
Switch B
3550SMIB# sh ip routeCodes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1
[Code]......
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Apr 7, 2012
My problem is that I have a Cisco 300 series small business switch with multiple VLANS each one with an IP address and two or three ports assigned to each VLAN. I have an E3200 wireless router that I want to use to use to share internet on the switch. All of the VLANs are reachable from the other VLANs and I've put a static route on the E3200 so that I can reach the VLANs from a machine connected only to the router. But I can't reach machines on the otherside of the router or get to the internet from the switch.
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Nov 25, 2012
I got a retired Zyxel Zywall USG200 from work. Its working just subs ran out. Was thinking of putting it on my home network, any reason not to? I'm a sys admin, not network engineer, so while I'm capable I'm not an ace with this type of equipment.. Which is why I want to mess with it. I'm currently RTFM and it seems pretty straight forward. If it seems like a viable piece of equipment I'd like to use it full time.
How bad can I break the internets and subject myself to the wrath of my wife's downed internet connection =D if I plug it in between modem and the switch?
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Apr 23, 2012
I need 10gigbit uplink for this switch. What are the other devices that i need order along with this device.And what is the diff between X2-10GB-LR= and CVR-X2-SFP.if i take CVR-X2-SFP, in future how can i upgrade from one gig to 10 gig?for current use i need 10gig support required. so what are all the other devices that i need to order.Fiber multimode and distance 15Mt only.
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Nov 2, 2011
i have an issue to connect a trunk between cisco switch and extreme switch i have many vlans that i want to cross via a link between cisco 3750 switch and a Extreme Alpine 3800 switch
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Dec 28, 2008
what is the use of no switch port command in L3 switch?
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Nov 18, 2012
I have two 3750-X configured to be a stack and I am planning to re-rack these somewhere else. What I would like to know is what are the effects of having the master switch itself lose power? Does it immediately just make the member take over master (there should be no election since there are only 2 switches??) and there would be no loss of connectivity?
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Nov 20, 2009
I have a Catalyst 4006 switch in production and a spare switch of same model. I have to quickly copy the configuration from production switch to spare switch (both L2 and L3 configurations) How do I do that?
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Apr 12, 2011
I am in the process of opening an internet cafe. I dont know exactly what a pc server does on the network... or do I really need one? Is the switch/hub sufficent to connect all pcs to the moderm to connect to the internet?
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Dec 8, 2011
The last few days I've been exploring options in getting rid of some old routers accross a wan connections. I have a cat 3560 to play with and I thought I would try and use the no switchport command test out routing with switch. I've got some type of route issue and I tried a few things which I thought would fix the issue but had no effect. I'll post the config and a few commands so you can see what the basic setup is.
Here we can see in the arp that it knows about both 10.7.1.2 (PC unable to ping 10.3.3.254) as well as 10.3.3.254 (ASA).I tried adding in a ip route of 10.7.0.0 255.255.0.0 10.3.3.110 as well as 10.3.3.254. Neither produced the results I wanted allowing 10.7.1.2 (PC) to ping the ASA (10.3.3.254). [code]
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Dec 17, 2011
I have been looking into this for a while and I can't seem to figure out why my 2nd vlan is not able to connect properly to the net.
My switch has 12 ports where my devices connects directly, they are all on Vlan 1 and they all work perfectly. on Port 12 I have a dlink router that is connected to a cable modem. the dlink router has an Ip address of 192.168.0.20
I created a second vlan (vlan2) and enabled dhcp relay on it. then I assigned port 9 on the switch to (vlan2)my laptop which is connected to port 9 seems to get an ip address fine and able to ping only some devices on my network (vlan1) and is not able to go out to the internet. I think it has to do with the routes. [code]
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Jul 27, 2012
I have the task of replicating the router config on a 3825 router on a 3750 switch. Reason is we are taking out the router and replacing it with the switch to make use of the router for other functions.
Below is main part of the router config:
!
ip source-route
ip cef
!
!
multilink bundle-name authenticated
!
license udi pid CISCO3825 sn FCZxxxxxxx
!
vlan internal allocation policy ascending
[code].....
The 3750 switch I have runs C3750E-UNIVERSALK9-M, Version 12.2(55)SE3 on a LAN BASE license.
The first thing I have done is to order for a license upgrade to IP BASE which would give the support for OSPF routing.I do not see much of an issue with the Interface configs, however, I am not too sure about replicating the routing config on the switch.
My question is can I run the commands as shown for the OSPF routing on the switch? If not, can I get suggestions on how best to set this up on the switch?
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Feb 5, 2012
I recently set up a small photography business and am trying to get a Cisco 877 and Cisco SG300-10 switch to talk to each other.
What I want is for the Cisco 877 to handle the internet and the SG300-10 to handle the local network,
I have set up 2 vlans in trunk mode on the switch and want vlan2 to manage local traffic and vlan3 to handle the internet.
I have got the 877 connecting to the internet what I dont have, traffic going to vlan2 on the switch from the 877
Look at the running configs for the switch and the router and tell me how to get the vlan on the router to pass traffic to the switch. In a nutshell I am inserting the internet into the switch but am not sure how to progress. I have the c870-advipservicesk9 image file on the router.
Switch Config
interface gi2
description connection-to-data-vlan
exit
interface gi3
description connection-to-internet-vlan
exit
vlan database (code )
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May 8, 2012
I have an environment of 3 X 3560G of which I have 1st switch-CORE(f0/10) connecting to the VPN router(CE) interface-f0/0. Remaining 2 Cisco 3560's(Access) are connected to Gi0/1 and Gi0/2 on the 1st switch-CORE via gi0/1 . On all three switches I have created multiple VLANs and assigned ports to these VLAN. The switch to switch connection is trunk allowing all VLANs created on all these 3 switches. Now the issue is how I am going to have all these VLANs routed through single interface on the routeri-e f0/0, as all these subnets will communicating to remote site over VPN. What should be default gateway on the 2 Access switches and the CORE switch, also what static route should be on router to reach all subnets(VLANs) created on these 3 switches.
I have read inter-VLAN routing i-e creating sub interfaces on router but dont want to proceed with that and looking for any other way to have my VLANs talk on all three switches and then are accessible to remote site ove VPN?
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Apr 16, 2012
I have been looking into this for a while and I can't seem to figure out why my 2nd vlan is not able to connect properly to the net. My switch has 12 ports where my devices connects directly, they are all on Vlan 1 and they all work perfectly. on Port 12 I have a dlink router that is connected to a cable modem. the dlink router has an Ip address of 192.168.0.20,I created a second vlan (vlan2) and enabled dhcp relay on it. then I assigned port 9 on the switch to (vlan2),my laptop which is connected to port 9 seems to get an ip address fine and able to ping only some devices on my network (vlan1) and is not able to,go out to the internet.
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Jun 4, 2013
I am trying to get my workstation to talk to a workstation on a different sub-net through a Cisco 3560 switch. The switch is running the following IOS version: [code]
My primary network is 172.16.0.0 and I am trying to connect to a device on a 192.168.111.0 sub-net. [code]
What would be the best way to get the two workstations talking via the switch?
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Mar 11, 2012
I'm running into what seems a basic ip routing config problem with a Catalyst 3750 (IP Base) switch. I have several VLANS configured on the switch with IP routing enabled, and the switch is connected to the inside interace of a new ASA 5520 as follows:
ASA5520 IP (Default gateway): 192.168.1.1Switchport Gi1/0/1 is configured as a routed port, IP address 192.168.1.3 255.255.255.0Example VLAN is VLAN 100, IP address 192.168.100.1 255.255.252.0 From the switch CLI, I can ping all VLAN addresses, as well as the ASA5520, and the client laptop I'm testing with from VLAN 100.
From the client laptop on VLAN 100, I can ping all switch interface and VLAN addresses (inter-VLAN routing is working), including 192.168.1.3, but I CANNOT ping the default gateway at 192.168.1.1.
Here is the relevant configuration information on the 3750:
!
no aaa new-model
switch 1 provision ws-c3750x-24
system mtu routing 1500
[Code]....
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