Cisco WAN :: Routing Between / 27 And / 30 Block VLAN100 To Physical WAN
Feb 21, 2011
The physical connectivity between the ISP network and External Switch 1 i.e. the /30 network is on port GigabitEthernet 0/19. The /27 network is configured as VLAN100. How do we configure such that all hosts in the 192.168.1.64/27 network can access the Internet using the .66 HSRP IP. Then of course we can configure routing in the Firewall to allow hosts in the internal network to access the internet too.
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Jan 29, 2013
I have two switches (2960S's) both with IP Phones on VLAN100..We need to monitor voice traffic via a monitor port on SW1 of all VLAN100 traffic on both switches.The following is what we have configured, but we cannot see VLAN100 traffic on SW1
According to Cisco doco you cannot have a SPAN and RSPAN on the same session, however since these are two sessions on SW1, I would have thought it to be OK.
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Apr 12, 2012
Is there any way to get an ip address through it's physical location? I was asked this by a friend and it's a good question. We know how to get the physical address by it's by coordinates, but is it possible to reverse it, getting the ip assigned to the physical address?
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Jul 14, 2008
what is the best configuration betwen vmware ESX server with 10 Physical NIC card and cisco 6500 , This ESX Server host 12 vm with VLAN 100,150.200
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Oct 25, 2012
I have a pair of router Cisco 2800 running in HSRP, now I want to configure one sub interface with another sub net, Will my current IP on physical interface work or do I need to create two Sub interfaces for each network. Do i must need encapsulation on sub interface
Current Config:-
Router 1:-
interface FastEthernet0/1description Connect to LAN_SW1 Gi1/0/1ip address 192.168.1.13 255.255.255.0no ip redirectsduplex autospeed autostandby 1 ip 192.168.1.1standby 1 priority 90standby 1 preempt
Router 2:-
interface FastEthernet0/1description Connect to LAN_SW2 Gi1/0/1ip address 192.168.1.3 255.255.255.0no ip redirectsduplex autospeed autostandby 1 ip 192.168.1.1standby 1 priority 110standby 1 preempt
For second network I do not require HSRP
Router 1:-
interface FastEthernet0/0description Connect to LAN_SW1 Gi1/0/1no ip addressduplex fullspeed 100
[ code]...
Router 2:-
interface FastEthernet0/0description Connect to LAN_SW2 Gi1/0/1no ip addressduplex fullspeed 100
[Code]...
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Nov 13, 2012
Firewall: ASA 5510
Switch: Linksys SRW2048
Physical topology: PC - > VLAN99 - > SRW2048 - trunk - > ASA5510
Switch Setup:
I've been tasked with breaking up a network that has run out of IP's, and have decided to use VLANs to accomplish this. I have to use an ASA5510 to accomplish all the routing between hosts in different VLANs.Port 48 is trunked to the ASA eth0/0 interface, with VLAN 99 and VLAN 20 tagging packets, VLAN 1 Untagged. Hosts hooked up to appropriate ports on Switch.
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Oct 18, 2012
Are there any physical characteristic differences between the 6509 and 6509-E chassis?
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Mar 17, 2013
I have 2 ASA5510's acting as routers/firewalls, setup on a LAN, each one pointing to a different gateway (different ISPs), and the exact same VLANs set up as sub-interfaces on each of these. Both act as DHCP relays to a Windows Server 2008 DHCP server. All the Trunking has been setup and works. When I Untag a switch port, and point it to whichever gateway?
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Jun 19, 2012
I am using cisco c3660 to act as Terminal Server for the communication of production machines in my company, recently there is a communication lost issue happen and its due to physical cable unplug from the machine. to troubleshoot for this issues i have to physically go inside my production area to check on it, as i understand from vendor we can check on the physical machine to see whether the LED light on the module is green or not, but in case of need to troubleshoot at night time, its time consuming as i need to travel back to company. is there any command that i can issue in the router c3660 to check on the physical connection between c3660 router and the production machine? the IOS version is IOS (tm) 3600 Software (C3660-I-M), Version 12.1(4)
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Dec 9, 2012
vlan interface and physical interface (that is serving for this vlan ) have different input/output counters, there is only one physical interface in this vlan .
sh int vlan 64
30 second input rate 9000 bits/sec, 9 packets/sec
30 second output rate 0 bits/sec, 0 packets/sec
[Code]....
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Sep 28, 2012
WE got our ESXi servers recently moved from a 6513 to nexus 2000 FEXs uplinked to a nexus 5000s basically we have enhanced vPC and nics goin to 2 different FEXs and they uplink to 2 nexus 5000.
the Vswitch for VMs is setup in a VPC. Question is do the traffic from each vm going in/out of these nics in a vpc actually use both physical links? How can i tell from the switch?
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Dec 9, 2012
We have recently upgraded oor LAN and we are using couple of Nexus5548UP switches in the core with 2960 stacks as access switches. Each access switches stack is connnected to both core switches with link being port-chanels and VPCs. All is working fine, but our SolarWinds management platform (NPM) is being flooded with "Physical Address changed" events. Here is an example of messages:
NSW_Core_2 - Ethernet1/7 Physical Address changed from 000000003811 to 73616D653811
NSW_Core_2 - Ethernet1/7 Physical Address changed from 200B82B43811 to 000000003811
For each interface I have messages like these repeating.I am not sure what those messages means or if there is actually anything wrong. Performance of the network is good, there are no errors on any interfaces and I do not see anything related in the switch loggs.
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Jan 12, 2012
how to configure this. I did it in the past but kind of forgot how I did it.I have a stacked 3750 (two physical switches) connecting to a 2960.
I am creating trunk ports with limited access to VLAN 300, 600, and 700.
There is two interfaces connected from the 3750's(one on each physical stack member) to the 2960.I have the physical interfaces configured exactly the same.
3750 Config:
interface Port-channel2
!
interface FastEthernet1/0/46
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1, 300,600,700
switchport mode trunk
speed 100
[code]....
Should I keep the configuration on the physical ports and not configure the Port-Channel Interfaces? Do I need to configure port-channel load balancing? Is the channel-group mode sufficient? Goal is to basically create 2 links to the 2960 to double the bandwidth and provide redundancy.
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Nov 14, 2012
What the different between using hsrp on vlan interface and on physical port (routed port) on Cisco 3750 Switch? Wha the benefits?
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Jul 9, 2012
I've Nexus 7010 switch installed in my DC. I've conncected Cisco router to one of the Ports. On the same port I'm getting following error message and hence, unable to form EIGRP neighborship.
DR-CORE-SW-S01-NEXUS7K %MODULE-2-MOD_SOMEPORTS_FAILED:
Module 1 (serial: JAF*******NGK) reported failure on ports 1/2-1/2 (Ethernet) due
to R2D2 : Speed patch failed - no frames transmitted in device 143 (error 0xc8f0
1273)
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Mar 20, 2012
I have a Cisco 2800 router. I have been noticing a lot of traffic to Pandora lately. At times my pipe is 25% music streaming and my router utilization can be quite high. Our web filtering is a hosted service that does not block all traffic depending on some of the ports. It is really designed for port 80 and 443 only.
We decided we want to block access to Pandora completely on both our primary internal LAN's and our Guest wireless LANs.
When I perform the ARIN lookup, I get these results for the IP range:
NetRange: 208.85.40.0 - 208.85.47.255
CIDR: 208.85.40.0/21
The CIDR notation does not make sense to me entirely. The IP range includes 8 class C networks. The /21 is a class b subnet of 255.255.248.0 or a router broadcast address for routing tables (depending on how you want to look at it). I was not sure if I could block the address based on the router CIDR range of if I had to use the individual classful IP ranges.
Should I block "208.85.40.0 0.0.7.255" in my ACL or should I create 8 entries to block the networks like this?
208.85.40.0 0.0.0.255
208.85.41.0 0.0.0.255
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Feb 23, 2012
We recently updated a site2site link to metro ethernet, ISP call it 100mbps LAN Extension, but to me it is just QinQ over fibre connection. Most went well, one thing (annoying to me) is we can not ping our switches on both ends anymore.
We have a 3750 in headend and another 2960 on the other end. I used to be able to ping/telnet to the management IP from one to the other. Now we can not. I think the ISP is applying some configuration on ports of their customer-premises equipments (both are Cisco switches) but agent in ISP told me no. I thought there is some configuration on Cisco switch to block "MAC discovery" but i just can not remmenber what was that and google also failed me this time.
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Jul 14, 2010
Got servers in vlan 10 ip range 10.0.0.0 and servers in vlan 20 ip range 20.0.0.0 at the same layer 3 switch. (c6509 sup720)I would like to block TCP traffic initiated from Vlan 20 to Vlan 10. But the servers in Vlan 10 needs to be able to open an TCP connections to Vlan 20 did test with the ACL thats blocking (ack/established/syn) but unable to get it to work.Or it works both directions or is works non directions.
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Jul 22, 2012
I have 4 vlan and all has conectivity/access with all (VLAN10,VLAN20,VLAN30 and VLAN40, I use a 3560 Switch for this propose, I need to modificate one vlan (VLAN40) that has access to the rest of the VLAN's BUT the rest of the VLAN's dont have access to VLAN40. I know that it is a problem of access-list BUT I can't undertand how to obtain the result that I like
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Nov 26, 2012
I have a 2800 router and tried so many ways to block the unwanted sites on my office network.Like access list ip based, null0 routing and policy map. Faced issues with below config
1. Creating Access-list. very difficulty to block the sites with https those sites will be opend, and we cant block all the IPs
2. Creating null0 routing. it also a bit deficult the block maximum sites because we can't fiend all IPs for those sites
3. Policy map.. with policy map we can only 1site we can block, but not more than one..
I heard that port based routing or port based access-list are the best ways to stop the websites in my local network..for this one i need to map the site to unsued ports then i need to null rouging or need to create the access-list.
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Nov 23, 2012
I have a cisco 2800 router.. (flash:/c2800nm-advsecurityk9-mz.151-4.M4.bin, Version 12.4(13r)T11) configured DHCP, DNS, NATING and Bandwidth restriction...And to stop some social network [URL] i configured ip route 66.220.144.0 255.255.240.0 Null0 (rang of facebook address) But still i am able to open facebook.com in my network...
ADMIN-II_2811#sh run
Building configuration...
Current configuration : 1812 bytes
!
! Last configuration change at 17:26:33 UTC Sat Nov 24 2012
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
[code]....
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Apr 16, 2013
Is there a way to block lan to lan traffic (except lan to gateway/gateway to lan traffic of course) on a Cisco 2960?
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Sep 9, 2012
In cisco documentation for the 3560 it is mentioned that blocking appletalk will not work .It shows up in command line but it is not working due to hardware limitation.Is there any other way to block appletalk on 3560 swiitches.
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May 20, 2013
I have arequirement where in I need to allow only specific vendor made desktops/laptops to be connected to the switch and block the rest. Say I want only the HP made Laptops to be connected on the Network. and block all other vendors. such as dell, ibm etc.
I am having Catalyst 4500 switches in My network. i tried using the mac access list using the permit and deny statement and then mapping the access list to the vlan access map and then filter using the vlan id. But this doesnt work on cat 4500....the same I tested for 2950 switch and it works perfectly. are there any restrictions on 4500 or any extra configuration has to be done.
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Jan 14, 2012
I want to understand - if 10G ports of 4948E (4 x 10Gb) they are block or non-blocks? I want to connect this switches with 20 GB (lag) to my BB switches and i need to prepare my infrastructure to 17.5GB troughput of video traffic.
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Jan 30, 2012
I wish to block some url that users have access through my LAN .That's i wish to block icmp,access towards such sites, i wish to block icmp because dns will resolve the domain and they can access through ip address.what i have in place is a cisco 2800 series routers,
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Aug 9, 2011
Is-it possible to configure a dedicated virtual IP address for VPN terminaison on ASA in version 8.3 and later ?I don't want to use physical IP address on my outside interface.
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Jun 4, 2012
I use Nexus 7010 as our layer 3 router.I have ssh feature turned on so I can manage it from the management interface. I just found out that users can use putty to ssh to the local SVI interface of the NEXUS. Although they still need username and password to login but we dont want them even able to bring up the welcome screen.Example, user's IP is : 172.16.25.100 , they can ssh to 172.16.25.1 which is the NX SVI interface.
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Mar 14, 2013
I have an alcatel 6850 switch connected to a 3750. Two connections (cables) are used between the switches. The two connections from the alcatel are in different vlans 10 and 60 , but the cisco ones are in the same vlan ie 1 (I know not best practice but keep with it ). The cisco cables are connected into port 1 and 4. Port 1 is forwarding and 4 is blocking. The 3750 is configured with basic default pvst configuration.The alcatel is the root bridge. As can be realised traffic from alcatel on vlan 10 cannot pass traffic to the 3750, This was established by the spt seeing the same mac from the root bridge therefore blocking port 4.To stop this from blocking in this scenario I was going to use bpdufilter.
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Nov 16, 2011
I need to block this mac address in my 3550 switch.i enable port security but this mac address comes and do the violation and port is shut down.
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Jan 10, 2012
I have two 3560x Catalyst switches setup between two different locations. They link via a PTP line (Layer 2). I have setup Intervlan routing between the switches and that works fine.Each location has a separate subnet and a Windows DHCP server for each subnet.I want to block any DHCP requests to be sent from hosts on one subnet to the DHCP server on the other side (i.e across the PTP link) What is the best method to do this?
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Feb 5, 2013
I am trying to connect a Control network that can not have access to the Internet, or any other network for that matter, to my Admin network so that I can retrieve trend data about the plant that goes into a database. Right now the process is print information, hand jam into excel spreadsheet, print again, and hand jam into another excel spreadsheet on the other network. Reports are printed automatically once a day, but would like a simplified way of getting data from one network to the other without having to re-enter data several times. Current policies stipulate no USB drives connected to Control systems. Even if we could loosen that, personnel needed to transfer data is not available and going to each individual machine would take more time than current system.Now that background is laid, I have two 2911 ISR routers with EIGRP configured, each with a 4 port EHWIC card. The 3 L3 ports on the router are setup as follows: interface G0/1 to the internet, interface G0/2 to a wireless back haul, and interface G0/0 for IT network. I then have 3 VLANs setup on the EHWICs for our Admin network. We will move the IT network to a VLAN on the remaining EHWIC port and connect the two 2911's through the G0/0 interface. I am going to have one computer on my Administration network dedicated to receiving the information and have a program that will take that data and import it to a database. I need to allow only that computer to receive traffic from the Control network and I need no traffic to flow back into the Control network. In other words I will transmit data from the control network to the admin computer using one protocol (TFTP more than likely) and block any other traffic coming out of and going into the Control network.
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Jan 9, 2012
I have a layer 3 switch, 3550.I have several vlans on there just for playing around with. One of the vlans, has a vonage linksys box attached to it with a UK number attached. From time to time telemarketers call at 03:00 in the morning, this as I'm sure you can imagine is not much fun. The linksys box gets 192.168.3.3 as it's ip.The switch is connected to a non cisco router at 192.168.0.1
interface FastEthernet0/24
no switchport
ip address 192.168.0.2 255.255.255.0
I was thinking a time based access list would work best I have tried several variations but the phone still rings. I have tried access-list 1 deny host 192.168.3.3 permit ..... and more extensive lists but the phone still rings. I have not applied the time-range yet, so that's not the problem.I have applied the list to the vlan interface and to fa0/24 but it's not working.
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