Cisco Switching/Routing :: 2960 - Using PAGP As Backup For Wireless Link With Another One
Jul 7, 2012
use PAGP as backup for wireless link with another wireless link.
__WiFi________
PC-------Switch 1 Switch2---------- PC
__WiFi________
We are using 2960 series and from this reason we cant use L3 PAGP I dont know how is PAGP working. If it is checkung port status (UP/Down) or there are some specific L2 packet between etherchannel ports in group?
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Jan 13, 2012
I think that a catalyst3560X connect to VSS Catalyst 6509 by ether-channel.
I'd like to connect a catalyst3560X to VSS Catalyst6509 by the Ether-channel.
I heard need "Enhanced PAgP" that VSS Catalyst6509 connect to by Ether-Channel.
I don't know supported "Enhanced PAgP" on Catalyst3560X.
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Oct 15, 2012
I have the Cisco VSS consisting two chassis 6509.I have the system Active-Dual detection via Enhanced PAgP with one neighbor - standalone cisco 3750. All works good.I want to add one more neighbor - cisco stack 3750x with 3 members. Will this scheme work? And what is in danger, if the stack is split into two parts?
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Mar 23, 2013
Devices are 3750-24TS Switches, software version is 12.2(55)SE6. how to troubleshoot this issue, I have a pair of ports which are not bundling, no matter what. Is the same behavior with LACP or PAgP. In this outputs I have only the PAgP case.
Output is similar to:
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
12 Po12(SD) PAgP Fa1/0/23(I) Fa1/0/24(I)
Configuration on ports is simple:
SW1:
interface FastEthernet1/0/24
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 12 mode desirable
[code]....
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Jan 8, 2012
I have two 2960 switches connected with two links. One of them is transparent modem connection with 2Mbps limit, and the other is optical link with media convertos on both sides. Is there a way to set up etherchannel, LACP or any other kind of link transparent to switches or I have to use some sort of STP?
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Feb 16, 2013
I have 2 devices which need to communicate through Logical Link Control. Each device functions like this: they have a built in network switch that allows their internal components to communicate with TCP/IP which is then encapsulated inside LLC frames and sent out a special port. The LLC frames from each device all come from a single source MAC address and are broadcast out the network. The receiving deivce receives the LLC frames, unencapsulates the data and uses it directly.
Using it this way through a single 2960 (such that device 1 is connected to fa0/2 and device 2 is connected to fa0/23) with its own dedicated VLAN and no other traffic on the switch (all other ports shutdown), the two devices are unable to "connect". Using a SPAN session, I can clearly see them exchanging LLC frames, but if I connect my computer to the internal device switch and try to ping the other device through the LLC encapsulated link, I get anywhere from a 25% to 100% loss with response times between 2ms and 15ms.
When I connect the special ports of each device together directly with a straight through cat-5e cable, they can connect and I can successfully ping through the link with sub-millisecond response times. The same goes if I connect them through an old unmanaged Linksys switch. I have toggled everything on the 2960 I can think of, including STP, CDP, LLDP, storm control, keepalives, IGMP snooping, management interface VLAN1, and QoS. In general, the more of those that I turned off, the faster the ping responses became, but nothing seems to stop the data loss.
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Jan 6, 2012
below is the current config of link that is already up. I need to add another fiber redundant link between 6509 and 2960 stack. How to work on config Spanning side by not taking 6509 down after the change. 6509 is in distribution.
---------------X-ALPHA-IDF-1FORMS-2960S-0# (SIDE)
!interface GigabitEthernet1/0/52description X-ALPHA-F-6509-0 uplinkswitchport trunk native vlan 18switchport mode trunksrr-queue bandwidth share 1 50 30 19priority-queue out mls qos trust dscpmacro description cisco-routerauto qos trust spanning-tree portfast disablespanning-tree guard loopip dhcp snooping trust!
-----------------X-ALPHA-F-6509-0# (SIDE)
!interface GigabitEthernet3/10description 1st floor POC2 Forms IDFswitchportswitchport trunk encapsulation dot1qswitchport trunk native vlan 18switchport mode trunkno ip addressmls qos trust dscpspanning-tree guard loop!
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Feb 7, 2012
I have an existing stack of 4 x 2960-S switches connected by stack cables.I would like to add another 2960-S switch to the stack but am unable to as the 2960-S will only allow 4 x 2960-S switches per stack.how I would add the 5th 2960-S switch to the existing stack of 4 x 2960-S switches.
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Feb 11, 2013
I have a 24 port 2960-S that is not communicating with a 2960-LST that it is directly connected to over fiber. The link is up on the LST but will not come up on the -S. What command should I use to bring up this link? I have tried no shut from the (Config-if)# prompt.
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Oct 7, 2012
I configure HSRP on Router 2951 as a primary router, and Router 2811 as backup router. But when I am switching off my Primary router the backup router is taking 2 mins to take over form primary router.
[code]....
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Mar 2, 2012
I have NM-AIR-WLC6-K9 in Cisco 2821. Is there opprotunity to retreive configuration via SNMP as from Cisco Catalyst 2960?
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May 20, 2012
I'm trying to configure an 1142N AP + 2960-S + ASA5505 with wireless, vlans and trunking with no success. DHCP is provided from my DHCP-server on the inside.
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Mar 14, 2012
My company uses Cisco 891's in replacement of the 1811 where we would have DBU used via an external modem and a triggered time of 3 minutes after a primary connection failure was identified. In testing the 891 in a Layer 2 failure environment, it is within milliseconds that the v.92 port is engaging after the layer 2 failure. Has anyone been able to get it to attempt at a more than millisecond rate?
Redacted config from router:
ip sla 1
icmp-echo <%= probeIP1 %> source-interface GigabitEthernet0
[Code].....
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Mar 15, 2012
how to backup the configuration of ACS 5.3 then restore it on the secondary ACS 5.3 Appliance in order to save time without configure the 2nd Appliance?
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Nov 21, 2011
I am replacing a faulty sup720 on a 6513. It s the backup/hot not the active sup. It has the same IOS on it. Is it correct that all I need to do is remove the faulty and replace it with the new sup and do a wr mem? Fromwat I have read their should be no down time all connectivity should remain stable?
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Dec 30, 2011
I have 2960G that in rommon status.I need that the switch work in 0x2102 (regular mode).I don't have a backup to configutratuio in my PC.I do wr before the switch go to rommon (startup config).What to do in order to the switch will be in 0x2102 (regular mode) with the same configuration( before the switch go to rommon)?
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Feb 5, 2013
We backup the running config on the 6509 does it also backup the vlan.dat as well?I tried command dir/all and just dir but did not see the vlan.dat listed
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Feb 26, 2012
i'm looking for a cisco 881 configuration with SDSL line as nominal and ADSL as backup.
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Dec 21, 2011
I need to backup my ASA 5505 configuration and restore it to default, then I'll configure manually the new config, but if something doesn't work I want to restore the backup made before.
I tried the "copy run tftp" command, and it always answers the same: Result of the command: "copy run tftp" [code] I read everywhere its supossed to prompt asking me tftp server address and file name.
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Apr 9, 2013
I have a small doubt with Nexus 7k,5K,2k & 1K.We want to backup the running config to my desktop through tftp.When i tried to backup from Nexus switches showing like below Nexus 7K. [code]
It's showing two choices which one I have to follow "copy running-config startup-config" or "copy running-config startup-config Vdc-all". [code]
It's showing two choices which one I have to follow "copy running-config startup-config" or "copy running-config startup-config fabric"
It's showing three choices which one I have to follow "copy running-config startup-config" or "copy running-config startup-config fabric" or "copy running-config startup-config vdc-all". [code]
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Jan 8, 2013
my 2970 having intermittent problem. i would like to swap with my backup switch WS-2950T. when i try to configure the 2950 following the 2970 config, i unable to perform this command "switchport trunk encapsulation dot1q". does 2950T does not support this command??
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Oct 25, 2011
What is meaning backup on HSRP statas?There are 5 vlans.The other four vlans aren't backup status.Only one of five vlans display messeages. When I reload Catalyst3750E-1,debug log. [code]
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Feb 28, 2012
Just purchased a SG300-52 and am trying to upgrade the firmware to 1.1.2 but cannot get the Upgrade/Backup Firmware Language page to load in the web browser interface. I have tried IE 8 and 9, Firefox 3.16 and 10.02, and Chrome from Windows 7 and XP Pro systems also tried FF and Chrome from Ubuntu system. The page just never loads - doesn't show anything.The same is true of the Download/Backup/Configuration/Log page. The other links under Administration > File Management seem to work fine.
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Jul 24, 2012
how to configure a backup route to the internet. My client has 2 ISP and basically they want to use 1 ISP and in case the ISP fails, use the other one as backup route to the internet.
The problem I’m facing is that each ISP is plugged to a dedicated ASA 5510, so 1 ISP in one firewall and 1 in the other. Both ASA are plugged to an internal network in a dedicated VLAN with a L3 switch and that L3 switch manages the internal network.
My question is, how can I tell my switch to use ASA1 to go out to the internet and in case the ASA 1 OR THE LINK TO INTERNET used by ASA 1 fails, use ASA 2? It would be great if I can send traffic to the internet thru both connections at the same time. Also, I know the ASA has High Availability configuration, but that applies only if both licenses in the devices are the same and I have a mismatch with the SVPN license, and also I don't know if with my current topology I can use the High Availability model, so I think I can’t use that option and the solution must be applied in the L3 switch, but I don’t know how to tell it to use ASA1 and if failure of the device or the outside interface plugged to ISP 1, then use ASA2. Besides, I would like to know how to optimize this config to do the switch between internet connections seamless to the users if possible (there are VoIP calls on this floor, so I don't want to drop the calls).
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Apr 18, 2013
I need to know the command to take the Backup and Restore of IOS Image of 6513 through tftp server.
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Jun 2, 2008
Have C3750 Version 12.2(25r)SEE3 , Trying to run:
kron policy-list backup
cli write cli copy running-config tftp://xx.xx.xx.xx/swi06-confg
kron occurrence backup at 22:00 Mon recurring
policy-list backup
There are nothing backup and nothing in the log.
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Jan 17, 2013
My management has tasked me to give them a high level overview of the different switching we can choose for our new building.
This is what I know so far.4 Closets, each closet has 450 ports,One MDF room that is will contain one UCS Chassis and a Nimble iSCSI SAN.
I am working on the spreadsheet and it looks like this (Not totally filled):
2960s3560x3750x45064510Approx cost (Each, 48PORT, POE+, 10G uplink, Dual PS, IP BASE)
6K7K8K45K75KMax Capacity192432432192384Backplane speed206464520520ProLeast ExpensiveStackable to 9Stackable to 9ProDual PSDual PSDual PSDual PSDual PSProLayer 3 opt
Layer 3 optDual SupsDual SupsConExpensiveExpensiveConNo Dual PSConLayer 2 OnlyCannot stack more than 4
For the MDF I would like to use 2 Nexus 5548's with FEX's, and the layer 3 daughter board. For the IDF's I was thinking of two 4010's.
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Feb 18, 2011
want to connect three networks with each other via two media one ethernet/fiber optic and other through wireless as backup link.how can i connect these three networks so that if my ethernet/ fiber optic connection fails than computer on networks can still communcate via wireless link (i mean if ethernet/fiber optic fails then wireless link should automatically be established/
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Nov 21, 2012
I am using a 3750 as a default gateway for multiple Vlans on a few 2960 switches. The trunk lines are configured and working and I have assigned ip addresses to each of the Vlan interfaces on the 3750. My issue is that I can only ping the ip address on the Vlan interface of the 3750 if I have a working computer plugged directly into the Vlan on the 3750. I only have 3 vlans on the 3750 that have hosts directly connected (vlans 2, 10 and 40) the other vlans ( 20 and 70) don't have any clients plugged into them on the 3750 but the hosts reside on 2 different 2960s that connect via trunk ports. How do I keep the vlan interface on the 3750 switch pingable when I don't have hosts directly connected in that vlan on the 3750? (yes, I have enabled ip routing on the 3750)
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May 21, 2013
I have a Cisco SG 300-20 as the core switch, layer 3. It is 192.168.4.6 on VLAN1 and 192.168.5.1 for VLAN2 (VOIP). All the ports are set in trunk mode. DHCP relay is setup on this switch.
The phones connected into a layer 2, Catalyst 2960-S switch. All ports are set in trunk mode. Default gateway on it is set to 192.168.5.1.
DHCP for both VLANs is provided by a Windows Server 2008 R2 server (the relay IP 192.168.4.15).
There is also an ASA 5510 in the mix which is 192.168.4.1. It has a route added to it for the 192.168.5.0 network to go to the SG 300 (192.168.5.1).
Just the two switches can ping each other on the 192.168.5.x network when I "add vlan 2" to the trunk port that is connected between the SG 300 and the 2960. The phones don't get DHCP on the 2960 switch. And I cannot ping 192.168.5.x from the ASA or anything else on the 192.168.4.x network.
After a bit of reading on intra-vlan routing for the SG 300 switch, I am thinking the SG 300 has to be the "center" of things so I need to make it 192.168.4.1 to be the gateway for both VLANs and change the ASA to 192.168.4.2 for VLAN1, etc. And I really can't do asymmetric routing with this switch.
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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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Mar 15, 2012
how can i take backup of startup config to tftp server through tftpd server.I am using 4506e switch
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Apr 16, 2013
I thought I saw a post/question in regards to "how to" configure a Broadband backup for a MPLS circuit.. What I am trying to do is use a cable/dsl/ broadband (secondary) connection as a backup to a MPLS circuit (primary). I have EIGRP and BGP configured on both the branch endpoint and the tunnel headend. The tunnel is used by the interface that connects to the secondary circuit. The branch location router is a 1841 and the "headend" tunnel router is a 3825. I am wondering about the configuration/syntax of a "weight" or static route that can be used to have data flow over the tunnel when the MPLS circuit goes down - and then switch back to the MPLS circuit when it comes back on line.
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