Cisco Switching/Routing :: 3750 Switch Configured - Only Can Ping Gateway

Sep 27, 2012

how my switches are configured, a cisco 3750 and a cisco 4506.[code] i can ping the gateway from the 3750  however cannot get anything past that or enything to it.

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Cisco Switching/Routing :: How Many Port Channel Can Configured In Switch 3750 X

Apr 23, 2012

I would like to know how many port channel can i configured in the switch 3750 X ? and if there is a limitation by IOS ?

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Cisco Switching/Routing :: 3750 - Can't Ping The Default Gateway

May 3, 2012

This would probably sound like a stupid question but it took at least 2 hours of my time so far. I have a 3750 switch where a router and a server is connected. From the switch I can ping the router and server with no issue (directely connected). But from the server I am not able to ping the router. The router and the server are in the same subnet. The router is configured as the default router for the server. I am not able to ping the server from the router either. Here's the output of the ip route from the router. The server IP address is 10.1.200.21 and the router IP address is 10.10.200.1
 
10.0.0.0/8 is variably subnetted, 8 subnets, 3 masks
C       10.1.30.0/24 is directly connected, FastEthernet0/0.30
C       10.1.20.0/24 is directly connected, FastEthernet0/0.20

[Code].....

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Cisco Switching/Routing :: WS-C2960G-8TC-L / Can Ping Gateway But Not The Switch In Between

Jul 4, 2011

Default Gateway of ISP----> Switch------->Router
 
From my router, I can ping Gateway, however I cant  ping the switch (WS-C2960G-8TC-L) in between.

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Cisco Switching/Routing :: Cannot Reach Gateway Through Routing Switch (3750)

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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Cisco Switching/Routing :: 3750 Switch - ICMP Delay To Default Gateway

Aug 25, 2012

I had setup a lan infrastructure with 5 3750 stack swithes. In these 3 of them are in one stack which is acting as access switch, 2 of them in another stack which is as core switch where all the SVI is configured. Now, when i tried to ping from our edge pc which is connected in access switch to default gaeway, which is configured in core switch, the ICMP is getting delayed . But when try to ping from the same edge pc to another user PC, it is getting less tahn 1 millisecond icmp replies.
  
why icmp is delaying to default gateway , but working with another edge to edge pcs without any delays?

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Cisco Switching/Routing :: Ping From Vlan Interfaces On 3750 Switch

May 27, 2013

 I'm having some trouble getting my head round the following but I think it's routing related?
 
I have a Cisco 3750 switch with the following configured:

interface Vlan1
ip address 192.168.0.223 255.255.254.0
no ip route-cache

[Code].....
 
The 3750 is connected to a firewall which handles the routing.  From the 3750 I can only ping remote networks from the vlan1 interface not from vlan6,8 or 10 i.e ping 10.34.37.101 (remote network) source 192.168.0.223 (vlan1) works but ping 10.34.37.101 source 10.74.10.1 (vlan10) does not?  I can ping 10.34.37.101 from computers on the various vlans but not from the 3750 it self.
 
I looked at setting a default gateway for the various vlan interfaces

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Cisco Switching/Routing :: 2960 / 3750 - Can't Ping Or Telnet Into Switch

Sep 17, 2012

I have 2 switches. 2960 and 3750.  I have trunk on both ports of the switch.  there are couple of vlans and ports are assigned to those vlans. examples are management, voice and data. int vlan 1 has ip   there is default gateway  the hosts are able to connect to the internet when connected to the switch.  

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Cisco Switching/Routing :: Not Able To Ping Link Between 12-port 3750 Switch And ASR-9010

Apr 3, 2012

I have one 12-port 3750 switch having one gig connectivity with ASR-9010 router having IOS-XR. I am not able to ping this link with 9000 mtu size. I have enable system mtu jumbo on switch to 9000 and on ASR router interface mtu is set to 9114. At switch side switch interface is configured as a trunk port and one vlan has been passed on that interface. I am not able to ping the ip 172.16.10.2 with 9000 mtu size.

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Cisco Switching/Routing :: Can Ping From R1 To R3 SVI4 Gateway But Cannot Ping Host

Dec 12, 2011

I set this up and I can ping all the gateways but never the hosts.  I was hoping I could make these links between 6500's a mix of L2 and L3.  Check it out.  They are connected in a linear fashion R1--->R2--->R3.  I can ping from R1 to R3's SVI4 gateway but I can never ping a host on that SVI4.  I was hoping that I could use the port-channels between 6500's as routed links or as trunk links depending on the type of traffic....thought it would ease the migration.  I suppose I could always get rid of the port-channels and just make separate L2 and L3 links between the 6500's.

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Cisco Firewall :: 5510 Switch Does Not Have Default Gateway Configured

Nov 1, 2012

We have a 3560 switch behind a ASA 5510 at a site that we are trying to access via telnet over the internet, we find out the switch does not have a default gateway configured.  So I configure the following rule on the 5510: [code] Try accessing the switch, and all is good.  One of our change control steps is to identify any others are connected to the device via: [code] I see the connection and show users command return 172.16.30.15, as expected. How is it possible that address can connect to that switch. 

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Cisco Switching/Routing :: Router Is Connected To Switch 2960 Configured As DHCP SNOOPING

Sep 3, 2012

We have a DHCP SERVER implemented in a cisco router 2610.This router is connected to a switch cisco 2960 configured as DHCP SNOOPING. At the switch appear the next log message: [code] The ip address: 10.100.200.1 belongs to DHCP SERVER configured at router cisco 2610. What to do so these log messages does not appear any more? Do I need to do some configuration changes at some switch or router?

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Cisco Switching/Routing :: Isolated VLAN Cannot Ping Gateway ASA 5520

May 30, 2012

I have an ASA that houses 11 VLANs, and I am trying to add a 12th.One of the VLANs is for PCs that have internet only access.The new VLAN will be similar, but for multifunction printers only.VLAN 99 is for internet only and works fine, I can ping the gateway of 10.99.3.33 from any PC in that VLAN.I am creating VLAN 98, modeling it after VLAN 99, and I cannot get a PC in the vlan to ping the gateway of10.98.3.17.Both switch and ASA show the new VLAN 98 as UP, switchport is UP/UP.I have deleted and recreated VLAN 98 a few times, but I cannot get a PC VLAN 98 connectivity.Once it is working on the core switch, I will add it to the trunk to the IDS switches. VTP is not in use, everything is manual. [code]

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Cisco Switching/Routing :: SGE2010P VLan Cannot Ping Default Gateway

Oct 15, 2012

I have created two vlans, vlan 1 data and vlan 200 voice. the issue is that when an on one vlan i cannot ping the default gateway of the othe vlan from my PC. An using sge 2010p switches.
 
below is my configuration
p route 0.0.0.0 0.0.0.0 192.168.0.1
ip dhcp relay address 192.168.0.100
ip dhcp relay enable
ip dhcp information option
interface vlan 1
ip dhcp relay enable(code )

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Cisco Switching/Routing :: 3750 - Default Gateway And IP Redirects?

Apr 10, 2013

I have a bit of a mystery on my hands. I had a whole campus of Cisco 3750's cache a new default gateway. Example
 
Cisco3750#sh ip redirects Default gateway is 10.10.10.1
 Host               Gateway           Last Use    Total Uses  Interface172.16.0.5      10.10.101.179        0:00        185749  Vlan1172.16.0.76     10.10.101.179        0:01         47254  Vlan1192.168.0.154     10.10.101.179        0:00        183090  Vlan1
 
My question is what generates a IP Redirect packet or how does the switch know what to change the gateway to? As in my case the changed gateway was a dead IP address. So I am at lose how this happened. I this case the Host IP's are network management servers conducting polling.

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Cisco Switching/Routing :: 3560G - Cannot Ping Default Gateway With Route Map Applied

Apr 11, 2012

I have a 3560G and an ASA FW, for which I am trying to use PBR to append the next hop. The gateway is the switch VLAN address and the amended net hop is the same VLAN interface on the ASA. Trouble is, I can ping the FW from a client, but not the switch. If I remove the route map, I can ping both. Even more strange is this is the case for some VLANs, but not all!
 
Config:
 
HOST ON VLAN 96
IP 10.11.120.99
S/M 255.255.255.240

[Code].....

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Cisco Switching/Routing :: Cat 6509 Clients Could Ping Gateway / But Couldn't Route Through It

Feb 3, 2013

Last week we had some forwarding issues with our cat 6509e VSS pair, wherby clients could ping the gateway but couldnt route through it! we identified this as being core 2 in the vss pair, yesterday we rebooted the 2nd switch and now the issue has been resolved.

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Cisco Switching/Routing :: 3750 - Extended Ping With Df Bit Set

Mar 5, 2012

I am trying to test the MTU between two 3750 switches I have in the lab.  I've set the MTU with the command "system mtu 9000" on both switches and rebooted.
 
The only connections on the switches are the gig ports connecting the two switches.  Each interface is  a member of vlan 1.
 
I am doing an extended ping.  I set the datagram size to 2000.  When the df bit is set the ping doesn't go through.  If the DF bit is not set the ping goes through.
 
The debug ip icmp shows, 4d00h: ICMP: dst (1.1.1.1): frag. needed and DF set.
 
Why is fragmentation needed when the MTU is set to 9000?
  
GigabitEthernet1/0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0015.2b7d.0d01 (bia 0015.2b7d.0d01)
MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,

[Code].....

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Cisco Switching/Routing :: 6509 / 3750 - No Default Gateway Or Static Routes To Any IP

Mar 5, 2013

We have a 6509 series of core switches and 3750 series of L2 switches, There is no default gateway or any static routes to any IP.VLAN 1 is made admin down and another vlan is used for all communication here in this environment

Attached is configuration for reference But still I am able to take telnet or SSH. I want to know how telnet or SSH or tacacs authentication happens without any static or default route.

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Cisco Switching/Routing :: Catalyst 3750-x Icmp Delay To Default Gateway?

Sep 10, 2012

i am facing a problem when the client vlan is commmunicating with the default gateway on the core 3750-x.
 
ios in 3750-x core is  3750e-universalk9-mz.150-2.SE.bin.  But, client to client communication is happening without any dealy and icmp is less than 1 ms always.
 
When try to ping default gateway of client vlan, it is getting delayed (variable icmp delays). Is this an ios bug?

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Cisco Switching/Routing :: 3750 / 3800 - Configure Trunk Between Switch And Extreme Switch

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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Cisco Switching/Routing :: 3750-X Stacking Switch By Switch

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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Cisco Switching/Routing :: 1841 - Unable To Ping Remote Gateway Or Hosts On Other Side Of Router

May 30, 2012

I am just setting up a simple scenario with a 1841. Server @ 172.31.1.1 cannot ping 172.31.0.254 or 172.31.0.105. It can ping 172.31.1.250. The router can, on the other hand, ping devices on both networks. This is just for testing routing theory so I don't know why hosts on either side of the network cannot ping each other.
 
I am only using the FastEthernet interfaces on Router 1841.

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Cisco Switching/Routing :: Catalyst 3560 / 3750 - Can Ping PC From Switches But Not From PC

Feb 19, 2013

We have a couple of Cisco switches and connected a (Windows 7) laptop to one of them and it gets its IP address from a DHCP server.I can now ping the IP from all of the switches, no problem, also not when I log on to the core switch in the same VLAN as both notebooks. But from my (Windows 7) laptop, which is in the same VLAN as the target laptop, I cannot ping it.
 
I checked, default gateway is good on both sides, as are DNS servers.
 
Target notebook ---- Catalyst 3560 V2 switch === Core Catalyst 3750 switch (stack) === Catalyst 3560G switch --- My notebook

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Cisco Switching/Routing :: Unable To Ping VPN 3005 Concentrator From Telnet Session In 3750

Feb 7, 2012

The network is set up like this.
 
Host -----> 3750 (classic) running IPSERVICES stack ----> 3550 router -----> VPN 3005 Concentrator.
 
IP routing is disabled on the 3750 (it's acting solely as a switch) IP routing is enabled with an EIGRP process running on the 3550 router that has the network for the 3005 broadcasting.
 
I can ping the vpn 3005 concentrator from a telnet session in the 3550 but not from the 3750.I can ping between the 3750 and the 3550 vlan management interfaces.  Visually speaking it's like this
 
3750 ------> 3550  [Success!!!!]
3550 ------> VPN 3005 Concentrator [Success!!!!]
3750 ------> 3550 --xxxx--> VPN 3005 Concentrator [Timeout....]
 
I know this because I tracerout to the 3005 from the 3750 and it resolved the default gateway configured for the 3550 properly but then started timing out.
 
The 3750 is trunked to the 3550.
 
3750 is vtp client mode
3550 is vtp server mode
 
I'm wondering if there's a layer 2 issue involved here as it is a VTP domain and maybe it's not returning properly. 

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Cisco :: 5508 AP Configured As Rogue Detector And Configured Switch Port

Jul 21, 2011

I am testing rogue on wire using 5508 WLC and , I have a dedicated AP configured as rogue detector and configured the switch port where the Rogue detector is connected as trunk. I have plugged in an autonomous AP with open authentication to the same switch so that it can act as a rogue. On the WLC, I can see that Autonomous AP as rogue on Wire. But along with that I am seeing another AP as rogue on wire, even though i have plugged in only one Autonomous AP to the switch.

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Cisco Switching/Routing :: ASA5505 - Gateway Of Last Resort - Layer 3 Switch

May 23, 2012

I'm building the below network configuration:
 
WAN -------- ASA5505 ------<802.1q trunk>----- L3 switch -----<802.1q trunk>----- L2 switch w/ VLAN support
 
The following VLANs exist on the ASA and both switches: VLAN 10 (10.10.10.0/24), VLAN 11 (10.10.11.0/24), and VLAN 99 (10.10.99.0/24).
 
The ASA5505 performs the following functions: routing to/from the WAN, firewall, NAT, and DHCP for each VLAN.  It has an interface on each VLAN (10.10.x.2) for a DHCP server.
 
The L3 switch provides inter-VLAN routing and layer 2 switching.  The L2 switch provides layer 2 switching, with VLAN support.
 
What should the default gateway on the L3 switch be?  Should I set the IP of the physical interface connected the L3 switch to the ASA5505.

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Cisco Switching/Routing :: 3750x Application Not Working When Switch As Gateway

Jun 2, 2011

In change network topology, we are going to assign PC's Gateway as Switch (3750X) IP Address rather than server IP Address. Currently we have configured all Sytems's Gateway is Internet Server IP Address which we are going to replace with Switch IP as Gateway.Issue is while connecting specific application like team viewer in which application tried to send keepalive message to the live server and in case of switch/router IP as gateway. Connection doesn't established. However it is working fine when Internet Server IP treated as gateway.

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Cisco WAN :: 3945 / 3750 - Border Gateway And Switch Redundancy?

Jan 30, 2012

I'd like to establish a more robust border router/switch redundancy plan and would like to know if this seems like it would be reliable.I'm looking at using a couple of 3945 routers and 3750 switches in the configuration shown below.
 
The article found at [URL] outlines  the config between a single switch and router but I am looking at doing this with dual routers and switches.

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Cisco Switching/Routing :: 3750X - Application Not Working (Switch / Router IP As Gateway)

Nov 12, 2012

In change network topology, we are going to assign PC's Gateway as Switch (3750X) IP Address rather than server IP Address. Currently we have configured all Sytems's Gateway is Internet Server IP Address which we are going to replace with Switch IP as Gateway. [code]
 
Issue is while connecting specific application like team viewer in which application tried to send keep alive message to the live server and in case of switch/router IP as gateway. Connection doesn't established. However it is working fine when Internet Server IP treated as gateway.

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Cisco Switching/Routing :: Inter-VLan Routing On Catalyst 3750 Switch

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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Cisco Switching/Routing :: 3825 / Replacing Routing Function With 3750 Switch?

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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Cisco Switching/Routing :: About Intervlan Routing On Catalyst 3750 Switch

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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