Cisco WAN :: 3750 - Backup Interface Support On ASR
Jun 20, 2011
Does backup interface is supported on ASR?
interface GigabitEthernet0/2/1
description 3750_Stack_1
backup interface GigabitEthernet0/2/2
ip address 100.50.50.242 255.255.255.248
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Apr 27, 2011
i will going to buy a router 2911 but i want know if support a interface ADSL modulo like backup in case that my primary link WAN Ethernet down and up the adsl link with a module HWIC ADSL pots.
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Jan 18, 2011
I have two 3750 switch.switch A(main) and switch B is connected by OFC but i have another wireless link for backup.Now if OFC goes down then i manually connect wireless link with switch B for this reasons i am faceing a lot of problem. I want without any changing of cable if my primary link goes down then my backup link automaticaly goes up and vice versa .
Switch-A port gi1/0/9 and Switch-B port gi1/0/9 is connect by OFC Switch-A port gi1/0/8 and Switch-B port gi1/0/8 is connect by Wireless link (backup) i attach my network diagram kindly find the attachment file.
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Mar 8, 2012
I was just thinking about this the other day, iirc I read somewhere about hooking up a dial up modem to the aux port on a router so that if your service failed you could dial the router directly to get access and diagnose faults.
Does anyone still do this? or do you use other methods? Cause it seems a bit old hat to me and I figured if you are paying a line rental on a phone line why not get dsl as well?
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Apr 17, 2012
how to configure the 2nd WAN port to support 4G/LTE connectivity that will serve as the backup circuit to the primary MPLS circuit?
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Dec 9, 2012
I have an ASA 5510 running 8.4 with dual ISPs setup on 2 different interfaces: outside(primary),backup(backup). I also have a site to site VPN to another ASA in another city. The VPN is now setup on the outside interface and works fine. What I wanted to do is to make the VPN run over the backup interface only.
So, I modified the the crypto map on the remote side to use the backup interface IP and created a tunnel-group for it. I then created a crypto map for the backup interface and enabled ikev1 on it. The default route is set to use the outside interface so I created a static route that routes traffic bound for the outside interface on the remote side to the backup interface default gateway. I can get the tunnels to establish but no traffic is passing through them. I though then that I need a NAT for the tunnel traffic to I created a NAT as well but still no traffic passed. I tried the packet-tracer and it said the traffic was allowed and from the show crypto ipsec sa command I can see the tunnel setup but no traffic will go across it.
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Nov 21, 2011
I have setup ASA 5505 with 2 ISP, named outside (primary) and backup, the scenario is if outside down, then backup will take over, it works now. But it is not working when the primary connection cannot reach the gateway with the interface still up.
Is it possible when the primary connection cannot reach the gateway then backup automatically take over?
My configuration is:
ASA Version 8.2(1)
!
hostname cisco
[Code].....
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Nov 12, 2012
We have a 5510 and I have a second ISP setup for a backup link. We have 4 ports connected to 4 different internal subnets. I want to force one of the ports to use the backup ISP link at all times. I'm having a little problem with where I need to make the changes in my ASA.
Interface "outside" is my main ISP
Interface "building3" is my backup ISP.
I want to force the "Guest" network to use the "building3" link for all traffic. Here's a snippet of my config
global (outside) 10 interface
global (building3) 10 interface
nat (inside) 0 access-list nonat
nat (inside) 10 0.0.0.0 0.0.0.0
nat (Guest) 10 0.0.0.0 0.0.0.0
[URL]
Do I need to change the global pool or create a new one? I have a couple free public IP addresess on the building3 subnet I can use for a pool.
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Sep 2, 2010
I have a problem in configuring two pair of backup interface on my customer's router (3845). It's ok when I configure just one of them. If I configure both pairs of interfaces into backup interface, one of them will be in disabled mode, as shown below :
WANR01#sh ip int bri
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 172.16.199.106 YES NVRAM up up
GigabitEthernet0/1 172.16.3.5 YES NVRAM up up
Serial0/0/0 unassigned YES NVRAM administratively down down
Serial0/0/1 unassigned YES NVRAM administratively down down
FastEthernet0/1/0 125.213.133.186 YES NVRAM standby mode down
FastEthernet0/2/0 172.112.22.6 YES NVRAM standby mode/disabled down
FastEthernet0/2/1 123.231.177.238 YES NVRAM up up
Loopback0 172.16.199.12 YES NVRAM up up
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Sep 8, 2012
Since WLC5508 MGMT interface is configured a AP-Mgr at the same time, can I set a Backup Port to WLC5508 MGMT interface? Refer to WLC configuration Guide:
In the Backup Port text box, enter the number of the backup port assigned to the management interface. If the primary port for the management interface fails, the interface automatically moves to the backup port.
Note Do not define a backup port for an AP-manager interface. Port redundancy is not supported for AP-manager interfaces. If the AP-manager interface fails, all of the access points connected to the controller through that interface are evenly distributed among the other configured AP-manager interfaces
if I need to configure the backup port for MGMT interface, i need to remove the AP-manager on MGMT interface and create a network dynamic interface for AP-Manager ?
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Sep 16, 2012
I'm trying to configure scp for secure configuration backup. I've configured the SCP server with an account and password but, I keep getting the no such file or directory error
AP-C2R1C5-3750#sh run | b arch archive path scp://mchenry:PASSWORD@172.20.22.229//C:/Program_Files/OpenSSH/Cisco_Configs/Switch_Config
username mchenry privilege 15 password 7 XXXXXXXXXXXXXXXXXXXXX
ip scp server enable
Error: %scp: /C:/Program_Files/OpenSSH/Cisco_Configs/Switch_ConfigSep-17-16-04-44.172-1: No such file or di
SWITCH#ping 172.20.22.229 Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 172.20.22.229, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 33/33/34 ms
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Jan 20, 2013
Here's my problem. I'm going to be using Cisco 1941 routers at a bunch of remote sites. All of these sites have 2 comm paths out. Some of them have 2 IP/VHF radios and some have 1 IP/VHF radio and a copper link using Patton ethernet extenders. From the VHF radios the data hit our MPLS network back to our HQ and the sites with copper go directly back to our HQ. Everything ends up at a Cisco 4948 switch. The problem I'm having is that I want the routers at the remote site to use one ethernet port (G0/0) as the primary and the other (G0/1) as the backup interface. I've tried the backup interface command but the problem is that depending on where an outage occurs the ethernet link to either the radio or Patton stays up so it never switches over. We're using OSPF as our routing protocol and I'm sure there's something that can be done with it but I'm not sure what.
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Oct 16, 2011
I have a asa 5520 with an outside and backup interface. I am trying to configure two static nat statements from the inside to the outside and backup interface. Here is what I have configured so far.
object network obj-10.1.1.254
host 10.1.1.254
object network obj-10.1.1.254
nat (inside,outside) static 172.25.10.3
I want to also use nat (inside,backup) static 172.25.10.3
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Sep 17, 2012
I have a 3750 running 12.2(55) and when I configure BGP I only get the standard AS number choice of 1-65535, but my provider is supplying a 4-byte AS number which is six digits and it gets rejected at the prompt on the 3750. Does that mean no support on 3750
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Aug 16, 2012
I just want to know how many ospf routes a catalyst 3740 support ?The cisco doc or datasheets doesn't answer this clearly. Because there is only a statement "unicast routes"!? Does this means all unicast routes (eigrp, ospf....static)If so, there is a statement for about 10k routes ?
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Jun 16, 2012
I am having some issues adding updated definitions for Cisco C3750X-48PS switches.
We have ciscoworks LMS 3.2 and I need to update the definition/device support for these switches. We are conducting a network refresh and are having some issues with ciscoworks polling these devices correctly.
I have looked through the various user guides and searched on google with not much luck as to how to actually do this, the links I have found breifly go into it, but not indepth, and the cisco links I have found, of course have redirects to new pages which bear to resemblance to what is in the original document. Is there a clear guide out there on how to update the switch definiton in ciscoworks? So I can i can try and do this correctly?
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Nov 27, 2012
I use one PA-2H on my 7206vxr to connect 2 T3 lease line,Due to the performance issue,I plan to replace my Cisco 7206VXR to ASR 1006, When I check the interface option for asr 1000 series router,I don't find the HSSI SPA for ASR Series Router.Does it mean ASR don't support HSSI(T3)? or other SPA can use with my T3 lease line.
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Nov 24, 2012
I've had a read through the docs for the 3750 series switches, but nothing that definately says that jumbo frame routing will work on a SVI.One part specifically I'd like clarification on is:The default maximum transmission unit (MTU) size for frames received and sent on all interfaces on the switch or switch stack is 1500 bytes. You can change the MTU size to support switched jumbo frames on all Gigabit Ethernet and 10-Gigabit Ethernet interfaces and to support routed frames on all routed ports. It says supported routed frames on all routed ports, but this in the past has meant physical ports, and not Virtual ones.
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Feb 12, 2004
i want to know if the new Catalyst 3750 Support Private Vlan ?
or any other small Switches
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Aug 12, 2012
Now, I use Catalyst WS-C3750G-12S-S as BGP router. But it is switch do not support in higher 65535 (32 bit asn). In future, I plan to use two or three ISP (each will be connected through 1Gb uplink). I need a router, who will be support 32 bit AS number and work with two or three full view BGP tables. I look at Cisco 3900 series, and ASR1002F.
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May 6, 2012
I got the error in object when I try to add a new HSRP group in new vlan.All the HSRP group has the same HSRP group the 2.another way to provide clients's default gateway redundancy for each Vlan intead to use the HSRP?
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Nov 10, 2012
The data sheet for the 2232PP says you can use a SFP-GE-T, but there is no mention of 100Mbps. I want to recommend to a customer that they use 2232PP for an upcoming core upgrade, but it may need to support some existing 100Mbps devices which are currently connected to 3750s.
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Mar 5, 2012
I'm looking for switches that support single mode fiber connections and would like to know if "WS-C3750-FS-S Catalyst 3750 24 100BaseFX + 2 SFP" and "WS-C3750G-12S-S Catalyst 3750 12 SFP" can serve the purpose?
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Feb 17, 2013
I believe the answer is yes, but incorperating more layer 3 features of our 3750's, I want to know if they fully support EIGRP or OSPF?
Also for a small business of 4 locations, each with a 10mbps fiber and a 1.5mbps mpls... wouldn't you say EIGRP would be easier? Want to look at making the failover automatic if the 10mbps fiber goes down between a site, then the network fails over to 1.5mbps mpls. When the fiber returns in service then the network automatically preferr the fiber again.
Currently we use static routes and if there is a provider outage we have to manually edit the config to flip flop the routes.
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May 10, 2012
I heard that the WS-C3560E-24PD-S and the WS-C3750-48PS-S have a limitation on the number of 7945s supported (ie i can only run 10 or 15 on each switch before the power runs out). Any knowledge with these pieces of equipment verify the maximum supported? I'm having trouble finding documentation showing any maximums.
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Sep 17, 2012
I've been researching the 3750-x Netflow support but I'm not 100% sure of how much support it has. From what I've read the only way to get NetFlow support is to install a specific module that provides NetFlow. I also heard about how it might support s-flow but I haven't found out for sure.
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Mar 19, 2012
i have linksys modem which already working for different v lans then for lab we take other switch 3750 switch and created different v lans. v lans are working fine but we need internet for different v lans for that linksys modem how we can make interface V lan1/
ip address 10.1.1.10 255.255.255.0
ip default- gateway 10.1.1.1
no sh
interface Vlan10
ip address 10.1.2.1 255.255.255.0
no ip route-cache
!!interface Vlan20
ip address 10.1.3.1 255.255.255.0
ip route 0.0.0.0 0.0.0.0 10.1.1.1
ip dhcp pool vlan10
network 10.1.2.0 255.255.255.0
default-router 10.1.2.1
dns-server 10.1.1.1
!
!ip dhcp pool vlan20 network 10.1.3.0 255.255.255.0 default-router 10.1.3.1 dns-server 10.1.1.1
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Sep 6, 2011
I have just started to discover the power of EEM and am already monitoring config changes on our switches with EEM.I would like to be notified of any interface going up and possibly down. on our 6509's and 3750's This is just to be aware of anyone patching anything in.
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Apr 26, 2011
I have 3750 switch and there are couple of vlans.....i dont want to run the instance on all vlans....so i have decided that i will run passive intreface default command....now my lan link is layer three and i want to run eigrp on that so the command shd be as under?
no passive interface default interface gig1/0/10
no passive interface default interface gig1/0/22
(as i have 2 conections) and want to have two neibours.
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Jun 8, 2013
how ISE support on third party LAN switch, if the requirement is doing 802.1X based flexauth.Refer to the diagram i attached; 01 topology.png
Concern 1: if the 3com switch with 802.1X feature, but still without the full feature to support FlexAuth, policy encforcement, DACL etc. In this kind of situation, will user still able to authenticate (using method PEAP-MSCHAP v2), but authorization just grant with permit any any?
Concern 2: Can i assume i authenticated the 3com switch using MAB? But this will cause endpoint with no 802.1X, am i right?
Concern 3: cisco switch C4507-E, loaded with IOS version Cat4500e-UNIVERSALK9-M, version 03.04 and Supervisor Engine :WS-X45-SUP7-E, is this platform is supported in Cisco TrusctSEC?
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Feb 20, 2013
the phone connects to the 3750-A access layer switch (VTP mode client) which connects to the nexus 5596 (The nexus is the layer 3 device and set to vtp mode server) and finally we have a Voice recorder that connects to another access layer 3750-B switch.(VTP mode client)
For voice recording I need to setup RSPAN and the nexus5596 does not support RSPAN will the following have any impact on the nexus
IF I move the 3750-B to VTP server mode and run the command remote span on the VLan I need to Rspan its going to update the VTP data base in short it will update the vlan.dat file for all the switch in that VTP domain.
AS the vtp update reaches the nexus saying there is a change (keeping in mind the nexus does not support rspan not sure hows its going to handle that request and how its going to update its vlan.dat file)
Is it going to incremment the VTP revision number? can it crash the vlan.dat file on the nexus ? or do nothing and ignore the update and stop the update from proceeding to the 3750 A switch?
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Nov 14, 2011
Cisco 1900 , 2900 and 3900 have Interface Slots and Service Module Slots , My question is which type of card is support this slot.
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Sep 12, 2012
Cisco 3750 with IP Service Image 12.2.55, Trying to enable Web Authentication on Layer 3 interface:
!
ip auth-proxy name bp_auth_proxy http inactivity-time 60
!
interface GigabitEthernet1/0/5
no switchport
ip address 192.168.1.27 255.255.255.0
ip access-group 101 in
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