Cisco Switching/Routing :: 239 Multiple Static RPs And Access-list Behavior

Aug 14, 2012

I configure multiple static RPs and one of the ACLs denies a source will it move on to the next entry that covers it in another acl? [code] i.e. will be used as the RP for 224 to 238 and will be used as the RP for 239.Will that work correctly, i.e. if a source is trying to register with the router and its for the group, will it be denied against the first RP and then permitted against the second RP?

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Cisco Switching/Routing :: 3560 Default QOS Trust Behavior On Access Point Changed

Oct 27, 2011

I've just been testing QOS on 3560 with version 15.0(1) and it seems the the default qos trust behavior on access ports has changed. By default the trust state of a port is not to trust anything, however rather than rewriting the DSCP value of the incoming packets and settign it to 0 the switch now seems to leave the DSCP value unchanged.
SW04-C3560(config)# do sh mls qos int g0/2
trust state: not trusted
trust mode: not trusted
trust enabled flag: ena

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Cisco Switching/Routing :: 871 Creating Multiple Static NAT

Mar 11, 2012

I am trying to configure a Cisco 871 router.I have 3 servers on my network that need static public IPs but also still need to communicate on the local network.
I have given my WAN interface the first IP in the block and set up PAT for the rest of the computers on the network which is working fine. Next I set up static NAT rules for the servers translating 3 of the remaining public IPs to the internal addresses of the servers.
I can access those servers internally using the public IPs but not from outside the network. A tracroute from outside the network gets dropped when it gets to my ISP.
I've never configured more than one static ip for a network before and i know i've just missed a step here. Do I also need to set up static routes? Will that update the next hop's routing table?

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Cisco Firewall :: PIX 501 With 1 Static IP / NAT / PAT With Access List

Aug 24, 2011

I am having a problem getting this to work and I have always done it with 2 Static ip address.  but now this company changed to 1 and I am doing something wrong.

I have comcast with 1 static IP, I have a local LAN with 6 host and 1 server that does Mail and remote access and web traffic.

I need a config that allows me to use 1 static ip on the outside interface of the PIX and allow with an ACL 7 ports open to the server and allow all the local host out to the internet.

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Cisco Switching/Routing :: 877W - Multiple Static Routes / Same Destination Dialer0 And Vlan1?

Jun 10, 2013

Is there any way to have my Cisco 877W Router alter from using one static route to another static route when another router on the network is reporting destination host unreachable?
Router 1 (
Dialer0 -> ppoe to internet
Vlan1 -> local
 Router 2 (
Dialer0 -> ppoe to managed VPN (
Vlan1 -> local
Router 2 is connected to another network through a managed VPN and that network also has internet access. I want to be able to have two routes to the internet on Router 2. And when Router 1 internet goes down packets get routed through the VPN instead.
I currently have on Router 2
ip route
ip route Dialer0
ip route 250
Which does nothing when Router 1 has its Dialer0 interface shutdown, or goes offline completely.I suspect I could reverse the setup and have everything routed through the VPN by default and then if / when Dialer0 interface goes down it would switch to using Router 2, but if the problem is in the remote network and interface Dialer0 stays up, it would probably do the same thing... nothing.All devices mentioned are Cisco 877W routers with ADSL and a bunch of fast ethernet interfaces.

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Cisco Switching/Routing :: C3560 / Unexpected Behavior With SSH?

Feb 5, 2012

I have a weird situation with some switches.
Switch .55 can ssh into Switch .57 but cannot ssh into Switch .56.
Switch 56 can ssh into Switch 55 and ssh into Switch 57
Switch 57 can ssh into Switch 55 and ssh into Switch 56
The software on .56 is:
C3560 Software (C3560-IPBASEK9-M), Version 12.2(55)SE3, RELEASE SOFTWARE (fc1)
I noticed on .56, when I do a show ip ssh I get: SSH Enabled - version 1.5. It doesn't say version 1.99 like the others even when I configure version 2. Is this a bug I am running  into?

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Cisco Switching/Routing :: 2960-S Possible Switch Behavior When QoS Is Not Enabled

Jan 30, 2012

Document at url... is quite interesting,One of these goes about the behavior of a switch (2960-S and 3750G) when QoS is not enabled vs the one when QoS is simply enabled with "mls qos".What additional commands, beside "mls qos", would be needed so as to simulate as accurately as possible the switch's behavior when QoS is not enabled?

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Cisco Switching/Routing :: 3560 - Access List On InterVLan Routing

Dec 11, 2012

I implemented access list on cisco 3560 switch but it never works. I want to block access from network B to Network A and allow from Ato B
Network A.
Network B
The configuration is
interface Vlan1
description Data VLAN


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Cisco Switching/Routing :: 4500 And Mac Access List

Apr 11, 2011

I'm looking to implement a vlan filter to keep unnecessary stuff off my access-layer. Things like IPv6, IPX etc. I really only want IPv4, ARP and 802.1q on these 4500s. I know on 3750, 3560s etc, when I create the mac access-list, I can do it by ethertype, but on the 4500, I dont have that option.
4th_floor(config)#mac access-list extended Drop-traffic
4th_floor(config-ext-macl)#permit any any ?
  protocol-family  An Ethernet protocol family
4th_floor(config-ext-macl)#permit any any protocol-family ?

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Cisco Switching/Routing :: 1800 ISR Without Access List?

Apr 19, 2012

I have an 1800 isr that is running with port forwarding only.  It is running a series of ip nat inside source static address port address port commands.  It does not have an access list bound to the outside interface.  This is working fine, but i am wondering if this is a security concern?

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Cisco Switching/Routing :: / VLAN Access List Not Working?

Sep 5, 2012

Extended IP access list VLAN20
    10 permit tcp any any established
    11 permit icmp any any
    20 permit tcp any eq 80
    30 permit tcp any eq 443
    40 deny ip any any log

Above is the network diagram and access list for VLAN 20 and VLAN 30, applied on incoming direction of each valn.But still able to access other port which is not on access list, tried changing the direction with no luck.Inter vlan routing is enabled on CoreSwitch default router is

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Cisco Switching/Routing :: 3750 How To Write Access List

Jan 15, 2012

i have one Cisco 3750, am using it as Core Switch where i have 6 more access switches are connected deirectly, and we are using VLANs in our network with the IP reange of , now we had a new Internet connection which is dedicated to Exchange Server only.So we have TWO internet connection One for internet access to all users and another one for only Exchange Server.internet connection for the users is termiated at a Cisco 1700 Series Router and Internet for Exchage Server is terminated at a Cisco ASA Firewall.Now the problem is how can i write an access list, which says that all packets from Exchange server should be routed to ASA Firewall , and all other packets shoulde route to Cisco Router.IP address os Exchange server is,

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Cisco Switching/Routing :: 4506 - Interface Access-list

Nov 14, 2011

I have one computer connected to the 4506 that management does not want this PC to have access to anything on our network except our DHCP server and the one printer that resides on our network.  I created an extended access list as follows.  Our network is the 10.10.x.x and the external addresses the PC needs to access is 11.1.x.x.  Once this PC is rebooted, it is unable to access DHCP to get the needed IP address it bounces back to a 169.x.x.x address and stops working.
Extended IP access list 2000
permit tcp host host                           (gateway)
permit tcp host host eq smtp              (access from the pc to external server for smtp)
permit tcp host host eq 5721              (access from the pc to external server for remote access)
[ code]...
Then I applied the access-group 2000  on the interface the PC is connected to. What am I missing for DHCP to work and for this PC to always get the ip address that is reserved?

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Cisco Switching/Routing :: Not Able To Assign Access List To CMP Interface Of Nexus 7K

Feb 6, 2013

I am trying to harden my Nexus box and I am not able to ACL assigment command. Following are the commands I am trying to add.

interface cmp-mgmt module 5

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Cisco Switching/Routing :: 3550 / Access List - Block One Ip Or Port

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 as it's ip.The switch is connected to a non cisco router at
interface FastEthernet0/24
no switchport
ip address
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 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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Cisco Switching/Routing :: Vlan Access List In 3750x Switch

Feb 6, 2013

I have a LIII Switch Cisco 3750x ,with diffrent Vlans , Some users are in Vlan 102 ( and Some Users are in Vlan1 ( , now i want to restrict  the Vlan102 users to access Vlan1 , i am pasting my configuration below , how to create a access list . 
interface Vlan1
ip address
ip helper-address


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Cisco Switching/Routing :: 2960 - Mac Access-list Time Based

Dec 11, 2011

I need to enable/disable a mac access-list on a 2960 scheduled by time. The switch has lanbasek9-mz.122-44.SE6. As the mac access-list can not support time ranges, I tried EEM but seems like it is not supported in this device.

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Cisco Switching/Routing :: 4948 - Configuration Of Access List For VLAN 2

May 19, 2013

In my core Switch,there are 2 v LAN(V LAN 1 & V LAN 2)my switch is Cisco 4948,so be default ip routing is enable in it. My all servers (DHCP,HTTP,HTTPS) are in v LAN 1 & internet is also in v LAN 1.

My requirement is that v LAN 1 user should not communicate with the v LAN 2 and vice versa. But the v LAN 2 users need an access of all servers and internet which is in v LAN 1. How to configure the access-list. I have try on Packet tracer which i have attached.
note:v LAN 2 user should get the IP from dhcp server which is in vlan1.

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Cisco Switching/Routing :: 4503 -MAC Access-list Extended To Only Allow Gateway Traffic

Nov 7, 2011

We have a gateway on a 4503, say on port 2/1, and we only want the other devices that are plugged into the 4503 to be able to talk to the gateway and thats it.  The other devices are Motorola TUT DSL devices and they plug into the 4503 directly.
Normally "switchport protected" would make this very easy to keep stuff on one port from talking to other ports but with 4500's you are not able to do that command.  So we implemented a MAC Access-List Extended ACL.  Here is what we did
mac access-list extended BLAH
permit #host 0000.XXXX.YYYY any
interface range fa 2/5 - 20
mac access-group BLAH out 
The MAC address 0000.XXXX.YYYY is the MAC address of the gateway that is plugged into Fa2/1 and the DSL TUT devices are plugged into ports Fa2/5-20.  We would think that this config would only allow devices on the TUT DSL to talk only to the Gateway but we don't really think this is happening.  The TUT devices are learning about MAC addresses that are on other TUT devices. 

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Cisco Switching/Routing :: 3560 - No Access List On Switches And No Firewall Between Sites

Jul 15, 2012

I have 3 3560 switches which are configured with trunks between them. They run vlan 10, 11 & 12. I have a 'core' switch (switch 1) of these 3 to which an MPLS router is connected on vlan12. I in addition have another switch hanging off the 'core' switch via a routed link (switch 4). I have EIGRP configured as a stub and as such the IP address on the routed link at the core switch end is of a /24 from v lan 1 on the other switch. This makes the route directly connected and therefore distributed via EIGRP stubs. Switch 1 is then exchanging routes with the MPLS router (via EIGRP).
The problem I have is that from any sub net on any switch (switch 1, 2 or 3) I can ping (switch 4). When I try and ping switch 4 from over the MPLS I am unable to. If I trace to the switch I see it reaches the outside of the MPLS router, but is then unresponsive. The same applies if I try to ping switch 1 on Any of the other IP addresses of switch 1 respond.
The MPLS network is a managed solution to which I have no access. I'm told that the MPLS provider is able to ping switch 1 & switch 4 on the 192.168.13.x addresses from a remote router ( I have tried from a switch on the same L2 sub net ( and I don't get a response.
From switch 4 I am able to ping the switch on 1 of it's interfaces (, but not the interface I mentioned above There are no access lists in place on the switches and no firewalls between the sites.

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Cisco Switching/Routing :: N7K Hardware Access-list Resource Pooling Command Not Working

Nov 23, 2011

Not sure why the N7K M1 card doesn't take this command. It works on other N7K at different site. [code]

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Cisco Switching/Routing :: 5548 Add Access List To Both Switches Not In Config Sync Mode

Mar 21, 2012

I have two 5548's in sync mode: I have an existing ACL and I want to add a new line to it, but after I do and try to commit it states the verify failed. [code]

I have to add access list to both switches not in config sync mode.

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Cisco Switching/Routing :: 1841 Need To Block MAC Address / Applied Command Access-list

Sep 4, 2012

I am using cisco 1841 LAN router, I need to block MAC address i have applied the command access-list 1102 deny 0000.0000.0000.0000 mac address..... but it does not work.

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Cisco Switching/Routing :: Access-list Logging Rate-limited Or Missed XXXX Packets On 3560G

Jun 3, 2012

I'm getting this error message on syslog server (Kiwi syslog)access-list logging rate-limited or missed XXXX packets i did the following commands but still I'm getting the error :logging buffered 16386 debugginglogging rate-limit all 5000no logging consoleno logging monitorip access-list logging interval 30000ip access-list log-update threshold 30000 i don't want to report to the console or monitor i want to report direct to syslog server, because I'm monitoring all the traffic (permit ip any any log) !

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Cisco Firewall :: 5505 Static Nat With Port Redirection 8.3 Access List Using Un-Nat Port

Aug 15, 2012

I am having difficulty following the logic of the port-translation. Here is the configuration on a 5505 with 8.3,So I would have thought the outside access-list should reference the 'mapped' port but even with 3398 open I cannot remote desktop to the host. If I open 3389 then I can connect successfully.

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Cisco Routers :: Setting Up Static Routing Using Multiple RVS4000s

Oct 8, 2011

I have 8 RVs4000's to built a test system with. On each side of the network is 2 servers, both with 2 NIC's. Both are on different /24 networks.

The idea is to simulate a WAN link, with the RVS4000's G1 & G2 running in "Gateway" mode to simulate the WAN.  All other RVS4000's will be in Router mode ('R1,R2...etc..')  All networks in /24 range. As I understand it, the RVS4000 CANNOT take 2 diverse networks on the LAN side: - ie & on the LAN side. The NIC's on the server only need to communicate to the similar type of addresses on the other side - on server 1 to on server 2, but NOT to on server 2. The G1 & G2 link is so that all communications are routed between this link - as a testing point.
So, my questions are this:
1) Will this work? Is there any easier way of doing this? (Bear in mind this is the only equipment i have to do this). 
2) Is the static routing I have thought of work? (see below)
I know using the RVS4000's inbuilt RIP may be easier, but I've never configured RIP routing.  As this is a test environment, using static routing would be enough to get it going.  No security lock down is required, all I'm trying to enable is for the servers to communicate with each other (NIC1 on both servers e.g on server 1 to on NIC 1server 2, and NI 2 on server 1 to NI 2 on server 2  The 10.1.x.x networks DO not need to talk to the 192.168.x.x networks.  THe G1 & G2 link is just for testing - but all communications must pass through here and be routed to their relevant networks on the other side.

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Cisco Switching/Routing :: 2911 / 2960S - Multiple VLANs With Different Internet Access

Feb 17, 2013

We need to give differentiated internet access to three VLANs. Each one of this VLANs is used for totally different purposes, so traffic between the VLANs is not allowed. Each VLAN has its own internet access provided for the data center using one fast ethernet connection.

We're thinking about using cisco 2911 for Internet access, VPN and firewall. I suppose that best option for VLANs is using Catalyst 2960S or a swithing module for the 2911, but these two options are too expensive for us. We're thinking about using swtiches from the SB series (maybe a SG-200).

We're totaly newbies to VLANs so we have many doubts. This are our questions:

1) The 2911 has three on board ethernet interfaces; we have three VLANs and three internet connections, so we need to use HWICs to get three more ethernet ports. That's right?
2) We need three HWICs or there is some kind of HWIC with more that one ethernet interface?
3) The routing solution is to assign static routes in the 2911 for each interface connected to a VLAN through a 2911's interface connected to internet?
4) Simply connecting three different router interfaces with three different switch ports, each one of them assigned to one of the three different VLAN, are we going to get internet access for all devices in those VLANs? or do we need to configure something else like trunking, VSIs...?
5) Can we achieve our goals using the SG-200 switch?
6) We have the chance to use older routers, is this possible? We're specially interested in knowing if a 1841 or a 2801 router could be used for this setup.
7) This is not a production environment so we can use refurbished equipment.

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Cisco Switching/Routing :: 2900 - Multiple Vlan Access On Standalone Switch

Feb 3, 2013

The field engineer has a stand alone 24 port 2900 series switch that he has different equipment connected to and are segmented using VLANs. So for example, he's got ports 1-4 assigned to VLAN 10, 5-12 assigned to VLAN 20, 13-19 assigned to VLAN 30 and 20-24 assigned to VLAN 40. He would like all the gear on VLAN 30 to have the ablity to talk to all of the other VLANS, but VLAN 40 should not be allowed to talk with any other VLAN. Trunking would do no good here since the switch isn't connected to anything and you can only assign one VLAN per port.
Is there a way to do this within the stand alone switch? The only possible way I could think of would be to ensure that each VLAN has an assigned IP number (subnet) and doing this through access lists.

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Cisco Switching/Routing :: 3750G - Multiple Trunks From Core To Access Switches Without Loop

Feb 5, 2013

We have a Cisco 3750G Core switch which has physical connections, each configured as trunks to two HP Access switches. The client who uses these access switches would like to put a link between the two, but this would create a loop.
------- Core Switch -------
|                                          |
|                                |


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Cisco Switching/Routing :: 3560 Multiple Vlan Access To Port Connecting Phone System

Oct 25, 2012

I'm new to networking and was looking for some assistance. First off im using packet tracer to diagram my senario as I will be receiving my equipment next week to deploy.
Hardware to be used:
1. 2 catalyst 3560 switches
2. all connect to a sonic wall router
I have two companies that work in the same office space. I need to keep these companies seperate on their own vlan. They will however need to share the phone system.(Packet tracer file uploaded to give those who have the time to see what I put together.) [code]

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Cisco Switching/Routing :: 6509 - Configure Multiple Dhcp Pools On Switch For Multiple VLANs

Mar 9, 2010

Is it possible to have multiple dhcp pools for multiple VLANs? The switch is a 6509 and/or 4506 catalyst. I don't want to use server-based products.

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Cisco WAN :: Unexpected Routing Behavior On 7609 Router

Dec 14, 2011

We have a lab network set up with a 7609 router as the central core.  Scenario:  Laptop with a SIP client.  In the lab is a session border controller that will route signaling and media to a SIP gateway with a call agent ( and a media "handler" (  The call processing device will forward packets to an RF network (108.x.x.x) where an NCS cable modem sits.Call signaling works perfectly fine.  However, RTP traffic from the laptop to the NCS phone is getting routed incorrectly.  RTP traffic from the phone to the laptop works fine. [code]

Packet captures show the laptop to phone RTP packets are being routed back towards the corporate router.  These time out with ICMP TTL exceeded packets.  There are static routes for to the optical interfaces that go to the SIP gateway.  Interestingly, I can ping an IP on the SIP gateway (not used for media, but is pingable) in that static range ( just fine from the 7609 (i.e. it's not getting routed to the corporate router).  Unfortunately, the IP for the media endpoint on the SIP gateway is not pingable.  Config for the 7609 is attached.

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Cisco Switching/Routing :: Policy Routing Or Offset List For ASR1006s

May 23, 2012

I want to send a particular data stream (source-A  destination-B) through only one of two WAN routers to a remote site. The remote site also has two WAN routers. Traffic from source-A will travel through a core and distribution layer of 6500 L3 switches, running 12.2(33)SXH8, to the WAN routers which are two ASR1006s.  The remote end is the same - two ASR1006 WAN routers to 6500 distribution and Core L3 switches.  All 6500s are L3 uplinked to each other and to the WAN routers.  All traffic from the local site to the remote site routes throuh only one of the two WAN routers.  I want to move only traffic from source-A to source-B to the second WAN router to the remote site.
Would it be best to use policy-based routing or an offset list of some sort to accomplish this?  I've done PBR before where you just hand off traffic described in an ACL to a particular outbound port and basically hand carry the traffic to a point in the network where EIGRP prefers the route you want.

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