Cisco Switching/Routing :: DHCPv6 By Default On 3750?

Apr 7, 2013

I gave one of my interfaces a IPv6 address the other day and now all of my servers have IPv6 addresses in that subnet.
 
I'm reading about "ipv6 nd suppress-ra" and I think that's what I need to disable but that's not a valid command on the 3750. 
 
Is there a way to disable this 'automatic IP giving out' thing that I have going on?

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Cisco Switching/Routing :: Set IP Default Next Hop And Cat 3750

Dec 10, 2012

I just checked that PBR with setting ip default next-hop is not available on cat 3750. Any other way to do dual-homing ISP without this feature?

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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 :: IP SLA On 3750 Default Route Failover

Jul 27, 2010

IP SLA configuration fails over but cannot ping the 4.2.2.2 via Site B.  Here is the output on Cisco 3750...

SW2#show runBuilding configuration...
Current configuration : 2901 bytes!version 12.2no service padservice timestamps debug datetime msecservice timestamps log datetime msecno service password-encryption!hostname SW2!boot-start-markerboot-end-marker!!!!no aaa

[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 :: EIGRP Default Route 3750

Jun 20, 2012

I have a 3750 at a branch running EIGRP connected to two routers that both have configured:
 
access-list 1 deny   0.0.0.0
access-list 1 permit any
access-list 2 permit 0.0.0.0
access-list 2 deny   any
 
router eigrp 1distribute-list 1 out FastEthernet0/0distribute-list 2 in FastEthernet0/0
 
Due to this recently applied config the switch become unreachable from the outside and cannot ping anything. Everything connected to it works fine. I was able to remote into it from a switch behind it and noticed that the 3750 has no default route in the routing table. I do see a default route in the eigrp topology table. How to make the switch learn a default route maintaining the existing configuration on the routers.

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Cisco Switching/Routing :: Cannot Set Route-map On Interface Vlan In Non Default Vrf On 3750

Dec 12, 2012

Cannot set route map on interface vlan. which in non default vrf on Cisco 3750.IOS c3750-ipservicesk9-mz.122-55.SE.bin sdm prefer route in enable ip vrf users rd 200:0 route-target export 200:0 route-target import 200:0 interface Vlan201 description Users 1 ip vrf forwarding users ip address 10.31.76.1 255.255.252.0 ip helper-address 10.31.4.57 route-map fromuser permit 10 match ip address fromuser set ip next-hop 10.31.128.155 When I enter "ip policy route-map fromuser" to interface Vlan 201 I heve the message:
 
% Remove VRF configuration from interface Vlan201 first

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Cisco Switching/Routing :: WS-3750-24PS-E Default Value May Be Change Up To 256 DRAM And 128 Flash

Jan 8, 2013

The default value  of  DRAM and Flash memory are 128 MB and 16 MB of Cisco Catalyst WS-3750-24PS-E  switch .I want to know , wherther the default value may be change upto 256 DRAM and 128 Flash.

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Cisco Switching/Routing :: Default IGMP Snooping Is Enabled On 3750 From Documents

Nov 14, 2012

We have a 3750 acting as the core. By default IGMP snooping is enabled on cisco 3750 from the documents.but, when we see the ip mroute table on the switch, it doesnt show any output.

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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 :: 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 / Configure Rapid-pvst On Both Blade Switches Or Keep Default Configuration

Nov 14, 2011

3750 switch connects to Blade-switch_1 and Blade-switch_2 Spanning-tree mode is configured as rapid-pvst on 3750 switch, do I need to configure rapid-pvst on both blade-switches or keep the default pvst config.3750 is running VTP domain HQ and transparent mode Both Blade_switches are running VTP domain CLI and transparent mode To configure Etherchannel between 3750 and blade-switch_1 do I need to have all devices in same vtp domain?

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Cisco Switching/Routing :: Perform STFTP On 3750 Or 3750-X?

Jun 30, 2012

Do I need the Universal image to perform stftp on a 3750 or 3750-X?

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Cisco Switching/Routing :: 1941 / Policy Based Routing With Two Default Routes

Jun 24, 2012

I have a 1941 router configured for Policy based routing with two ISPs.Two static default routes configured to point the gateways of respoective ISPs with same metric.But the problem is, packets are going throug the one ISP only while doing traceroute.
 
N/W connectivity:
 
ISP1----->                <----------------------> LAN1   
               |  Router |
ISP------->                <----------------------> LAN 2
 
Below is my configuration :
 
Current configuration : 5958 bytes
!
! Last configuration change at 05:18:56 UTC Mon Jun 25 2012
!
version 15.0
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption

[code]....

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Cisco Switching/Routing :: 6509 MSFC - LAN Default Gateway Routing

Mar 6, 2012

I have two ISPs. Each is on it's own subnet connected to the 6509 MSFC/Switch. FW1 is on 100.1.100.0/30 and FW2 is on 200.1.200.0/30 subnet. My goal is route all traffice going to the Internet from subnet 10.133.3.0/24 to FW1 and all other subnets across the organization to FW2. I am not sure if I need to use ACL / Static route combo, or just a static routes or ACLS?

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Cisco Routers :: Does The RV180W Support DHCPv6-PD

Oct 9, 2012

Comcast has indicated that this is required for IPv6 to work, and since it means gatting a /64 address space for my network I am understandably eager to tak advantage of this new functionality when it is available in my area.

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Cisco Switching/Routing :: Catalyst 3560 - Routing Enabled With / Without Default Gateway Or IP Route Command

Feb 25, 2013

We have two catalyst 3560 switches running  c3560-ipbasek9-mz.122-58.SE2.bin  They are connected using etherchannel using gi 0/21 -  24 interfaces.
 
on 3560-1 switch, there isn't any ip-default gateway or ip route configured. It only have 1 interface vlan configured.
 
on 3560-2 switch, there is ip default gateway configured along with 1 interface vlan.
 
What i dont understand here is that, i can reach out to other subnets from 3560-1 switch in which the routing is not enabled?

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Cisco Switching/Routing :: Stacking 3750-X With Universal Image With 3750-G Running BIN Image?

Oct 10, 2011

I'm looking at adding a Cisco 3750-X switch running c3750e-universalk9-mz.122-55.SE1 (IP base license) into a stack of 3750-G switches running c3750-ipbasek9-mz.122-55.SE1.bin Given that the version and feature sets are the same I don't forsee any compatibility issues. Would there be any reason why a universal image wouldn't stack correctly with other switches running the single .bin file?

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Linksys Wireless Router :: E4200 To Get A PD From DHCPv6 Server?

Dec 18, 2011

i would like E4200 to get a PD from DHCPv6 server, and  E4200 could assign address in PD to PCs connected to it by SLAAC/DHCPv6.could current E4200 FW 1.0.3 support this?

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Cisco Switching/Routing :: Replacing 3750 24 Port With 3750 48 Port?

May 21, 2012

We have a stack of switches that is at the max number of members allowed in the stack. Problem is we are running out of port density and need to add more ports. So instead of adding a whole new stack I would rather replace 2 of the 24-port swicthes with 48-port switches.
 
If the two 24-port swicthes we are removing are stack members and neither of them are the stack master, I should be able to replace the 24-port switches with the 48-port switches without bringing the master offline? If the new 48-port switches are running the same IOS version as the current 24-port swicthes, they should add themselves to the stack?Would I have to tell the new 48-port swicthes what switch numbers they are replacing in order for them to be added to the stack since we are at the max number of members?Also since the 48-port swicthes are replacing 24-port switches will the master give the 48-port switches the configuration for only the 24-ports?

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Cisco Switching/Routing :: Default Routes In Nexus 5k

Apr 29, 2013

I have a pair of N5K's, down stream from them are from Fabric Interconnects and a UCS chassis.  Upstream is a stack of 3750's then ASA5510's. 
 
I am trying to backup the config to our TFTP server and I am getting 'no route to host'.. I tried to add a route, and found that N5K uses VRF's for routing?? .. After some looking I see there are two base VRF's 'management' and 'default'.. the management VRF has a default gateway entry and a single interface member (mgmt0).. when I look at the default VRF .. there are no interface members or routing entries.. Ok, I can handle that just add some interfaces and add a default gateway.  Then I get lost:
 
I'm able to access the UCS manager..... so how the heck is that even possible if there's no gateway defined anywhere (or maybe I'm missing something?).  My theory was: add all other ports but mgmt0 to the default VRF, and have the default gateway point out of the uplinks (a vPC).. but wasn't sure how that would affect anything and mainly just wanted to know how I was able to access the UCS manager in light of the fact that there is no default gateway anywhere that I could see...

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Cisco Switching/Routing :: 3750G Won't Factory Default?

Jun 2, 2013

I have a 3750G that used to be a Stack Master of a stack comprised of 2 identical switches. Since then, we have removed the stack from production, and I factory defaulted the stack MEMBER and that went fine. I just held the "Mode" button on the front until the lights all lit up and then issued the reload command and the switch came back with no configuration OTHER than the vlan database I issued the "del vlan.dat" command to no avail. I just manually removed all the vlans.
 
The stack MASTER on the other hand will NOT go back to factory defaults, and will also NOT erase the vlan database. Everything I try will NOT work. I've tried the following
 
1) Hold mode button & issue a reload after the lights start flashing

2) issue "Write Erase" then issue "reload"

3) issue "Write Erase", then issue "Write", then issue "reload"

4) issue "erase start" then issue "reload" (just in case the "write erase" command is being depriciated or something weird)

5) issue "erase start" then issue "copy run start" then issue "reload"
 
Is there a special way to reset a StackMaster back to factory defaults?

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Cisco Switching/Routing :: Default Gateway And VLAN200

Oct 18, 2012

imagine I want to make VLAN200 workstations communicate like the show in the attachment. What would be the default gateway to be configured in the workstation? If I configure 192.168.1.1 as the default gateway (R1 interface fa0/0) is this right?That could be possible because the switch should be configured with command "ip default-gateway 192.168.1.1"?

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Cisco Switching/Routing :: 3560g And Set Ip Default Next-hop Command?

Apr 18, 2013

I have 3560g with 15.0(2)SE2 version. I try to give different default gateways for different interfaces.I've already changed the sdm, run "ip routing" and made interest interfaces in "no switchport" with ip addresses.

my route-map is "
route-map ABC permit 10
set ip next-hop 192.168.77.3"

and it is applied on the interface with "ip policy route-map ABC" but  when I try to apply it says "%PLATFORM_PBR-3-UNSUPPORTED_RMAP: Route-map ABC not supported for Policy-Based Routing" everything is fine if I change from "set ip default next-hop" to "set ip next-hop" but it is not I need in the guide of the version it is said this statement is not in unsupported list of route-map commands.[URL]

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Cisco Switching/Routing :: Default IOS Image Of WS-C4900M

Jan 11, 2012

I'm not able to find in all the datasheets what's the default (out-of-the-box) IOS image of a WS-C4900M.When I buy a WS-C4900M I know that there is an IP-BASE IOS but which version?
 
On the datasheet there is a 12.2SG but is an IPBASE with SSH? W/O SSH? UPGRADE SSH? I'm trying to make a comparison between this image and a cat4500e-entservices-mz.150-2.SG2.bin (Advanced Enterprise Services) on the feature navigator to make sure the our customer need this last IOS Upgrade.

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Cisco Switching/Routing :: Default Username On 3560x?

Feb 6, 2012

I am stuck at a very early stage in the configuration of 3560x switch. It seemed very unusual and that is the reason, I configured basic config for line con 0 with login local. And then I had just put "enable secret xxxxxx."
 
Now I simply logged out and when i tried logging in, it is asking for a username. Now the thing is that I had not programmed any username. I tried using just "." followed by my secret password, but it did not work.

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Cisco Switching/Routing :: 6509 LAN Is Set Up With Default VTP Settings

Dec 2, 2012

my LAN is set up with default VTP settings
 
-core switch cisco 6509 vtp server
-access switches 2960 vtp server
-no vtp domain set on any switches
-no vtp password set
 
untill now i manually set the vlans on switches (didnt see anything  automatic created on switches)is there any danger with the above settings , that a switch with domain name set and higher revision numberwill delete my vlan settings? if yes how can i protect/disable vtp in my LAN

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Cisco Routers :: RV220W - DHCPv6 Prefix Delegation - Editing Configuration File?

Jan 25, 2012

I am trying to configure this router to obtain an IPv6 address from my ISP who offers a dual stack IPv4/IPv6 DHCPv6 Prefix Delegation service.
 
I did a WAN packet capture to see the type of DHCPv6 packets the router sends to the ISP in order to obtain an IPv6 address and I saw that the router is sending DHCPv6 solicitation packets of type IA_NA i.e. for Identity Association for Non-temporary Address. However, most ISPs that offer a dual stack IP4/IPv6 service, they use DHCPv6 Prefix Delegation in which case the router is expected to send DHCPv6 solicitation packets of type IA_PD i.e. for Identity Association for Prefix Delegation.
 
I then downloaded its configuration file and saw the following:
 
dhcpv6c = {}
dhcpv6c[1] = {}
dhcpv6c[1]["renewTime"] = "3600"

[Code].....
 
So, the option for the DHCPv6 client to perform a prefixDelegation request is disabled. Does that mean that if I set this flag to "1" it is going to work? Well, I edited the configuration file and changed this flag but the router refuses to load it! It complains about the file being changed. How does it know that? Is it computing some type of checksum? How can I manually edit this flag and update the router's configuration?

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Cisco Switching/Routing :: New Default Vlans On 3560e Switch

Nov 2, 2011

3945 is running c3900e-universalk9-mz.SPA.151-4.M2
3560e is running c3560e-universalk9-mz.150-1.SE
 
I've got brand new 3945's with onboard 16-port 3560e switches.  On the first power up I see that there are several new vlans added that appear to be default vlans..

vlan 2 name fst2
vlan 3 name fst3
vlan 4 name fst4
vlan 5 name fst5
vlan 6 name fst6
vlan 20 name VLAN0020
vlan 21 name VLAN0021
vlan 22 name VLAN0022
vlan 23 name VLAN0023
vlan 99 name VLAN0099
 
I deleted the vlan.dat and reloaded the switch but these vlans come back. What these vlans are intended for and is there a better way to get rid of them?  What does "fst" stand for? 

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Cisco Switching/Routing :: 6500 Two Default Routes Not Working

Oct 15, 2012

6500 - version (s72033_rp-ENTSERVICESK9_WAN-M), Version 12.2(18)SXF17a.I have two ISP's. I have created two defaults as follow & secondary route does not work. [code] After disabling the interface to ISP1, backup routes does not work. [code]

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Cisco Switching/Routing :: 7206 - PBR Not Changing Default Route

Sep 5, 2012

I have a MPLS cloud in our data center.  I want one network coming into our core router to have a different default route than the other networks coming in. I'm getting hits on the acl but the route isn't applied and goes to the default route that is configured in the router.  I have other PBR for setting local-preferences and as-paths and they are working fine. 
 
The router is a 7206 Version 12.4(11)T3
 
!
ip route 0.0.0.0 0.0.0.0 1.2.3.4
!
ip access-list extended 2nd_Default_Route

[Code].....

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Cisco Switching/Routing :: 2960 Default Gateway Ip Route

Jan 24, 2013

I have a Cisco 2960 ( WS-C2960-8TC-S)  running 12.2(46)SE  C2960-LANLITEK9-M  image.I would like to set an ip route 0.0.0.0 0.0.0.0 87.101.156.97  but the current image does not allow.Will ip default-gateway 87.101.156.97 work or do I need ip routing ?The ISP has provided a /30 address and we are using an additional /29 for our network devices.  I dont think this image can be upgraded.  I need to forward routes directly out to ISP. [code]

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