Cisco WAN :: How Many Catalyst 4500Xs Can Be Stacked Together
May 12, 2013
I'm designing a hierarchical 3 layer campus network with different switch blocks .We need 10Giga Ethernet in the core to distributions and access layer , I was thinking about using a pair of catalyst 4509E in each block.after that I got interested in 4500Xs , in comparison with 4509Es they are much thinner and saves more room in rack space .I wanna use 4500X in my distribution layer .
The question is , as you know 4500Xs have 40 10Giga Ethernet ports , in some of my switch blocks I have more than 40 access switches (40 uplikns to distribution ) i wanna know how many of 4500Xs can i stack together ?
Im trying to stack 2 3750E-24PD-S and 2 3750X-12S-S. The 2 3750E finds eachother and stacks with one master as they should. The problem is that and the 3750X does the exact same thing instead of joining the 3750E stack.Both runs the same IOS (c3750e-ipbasek9-mz.122-58.SE2).The stackingcables are connected like following atm (I tried booting up the switches one at a time and all at once, no difference in the result).
We've have a 2 SGE2010-48 port, stacked. 4 LAGS are denifed, two on primary, whitch are working, two on slave unit are NOT working. Devices connected to LAGS are de the same and same configuration (Cisco ASA 5510).
I have a 4 member stack of 3750's. We would like to take advantage of wccp and we understand that we will need to upgrade our switch licensing from IPBase to IPServices. My question is do we need to pay for a license for each member in the stack or does one IPServices license upgrade cover the whole stack?
I am about to buy 2x Series 500 switches but before that I have a design to be sure :I want to create a redondant network so it is the reason why I want to stack 2x Series 500 switches.Each server on my network (ESX and Windows 2008) are connected with two NIC (one port on the first switch , one port on the second switch), with trunk mode + etherchannel for LACP.
First question : I saw that the limitation is up to 8 etherchanel groups, can I have a mix of multiple servers on the same etherchannel group or should I create one etherchanel group for one server with only the two NIC inside?
Second question:I want to use the series 500 to do intervlan routing and want to be sure that if the the ports are in trunk mode with some vlan set on the card itself that the default gateway for the vlan will be propagated on the two switches (in stack mode) and will not cause any issues when both switchs works fine and if one switch crashes?
I'm trying to see if I can use both ethernet ports on a 2811 to run hsrp for non-stacked dual switch fail over. Then link the the NM-32A ports to L0, so the remote access server trying to use them can use the l0 ip and failover much faster (it's programming is limited). This is on IOS 12.4(25)f, though we are moving to 15 soon.
If we have 3 stacked 3750s# running Layer 3. Do we need license for every switch? or is it one license for the 3 switches? Also is the license associated with the MAC address of a specific switch? What i# am trying to know also, is if we have to install one license and it is associated# with one MAC and this switch failed.. will the Layer 3 be broken?
I currently have a stack of 3750G switches with a cross stack etherchannel connected to a 3750E stack in the distribution layer.The 3750G stack is running 15.0-2SE IP Base. I began noticing the Mac flap issue when I was Re-enabling dot1x on the switchports. As first I thought dot1x maybe have contributed to this so I removed it from the stack temporarily.I am still seeing Mac flap logs usually when a machine reboots or re-connects back to the network. These are all wired desktops.I started looking at the etherchannel configuration which is using LACP. The 3750E stack looks fine with all ports in mode active. On the problematic 3750G stack I noticed 3 of the ports in the etherchannel set to mode active and 1 port set to mode passive. The port shows as bundled but I can't imagine this is ok.The only other difference on this one port is there is no mls qos commands like on the other 3 interfaces in the port channel.I mainly need to know what the Mac flapping is about. Whether it is a bug or related to the current etherchannel configuration.
I have a customer who just bought a pair of N5K and wanted to replace his current HP E3800 as Core. He wants to use the 4 x stacked HP E3800 connect back to the N5K. Will I be able to utilize VPC through a bundled 2 or 4 x 10G (40G) connection (10 or 20G on 1 switch, and 10 or 20G on another switch) from the stacked HP E3800s to the N5548s? I know you can do that with Cisco 3750s.
We're running two 5508 WLCs running 7.0.235.3 pushing out 7 WLANs. They are both live. Each WLC is connected to the same stack of 3750G running 12.2(44)SE6 via Etherchannels.I'm getting tons of MAC flapping errors similar to this:9373213: Feb 19 10:53:54.564 CST: %SW_MATM-4-MACFLAP_NOTIF: Host 843a.4b3c.4cec in vlan 752 is flapping between port Po12 and port Po11Each portchannel consists of ports on each of the two switches in the 3750 stack. Only VLAN 752 shows the flapping activity. LAG is enabled on the each of the WLCs. The portchannel and interface configs are identical, minus the channel-group command of course.Maybe completely unrelated....looking at CDP neighbors from the switch is incorrect:
WLC1 Gig 2/0/44 157 H AIR-CT550 Gig 0/0/1 WLC1 Gig 1/0/21 157 H AIR-CT550 Gig 0/0/2 WLC1 Gig 1/0/20 157 H AIR-CT550 Gig 0/0/3
We have two 3750-x stacked switches with IP base license. We need to upgrade them to IP services license. I read some where that it is possible to install IP serivces license to only management switch and no need to purchase/install same license to other switches on the stack. But, I could not find/recall where I read it and as far as I know it was not official cisco documentation.
I was wondering what general steps might be taken in order to "replace two(2) 3750 (stacked) with one (1) 3750X - Server Access". General steps and what I might have to do configuration wise. I know i'm copy pasting the existing configs into the new switch, but are there any caveats?
How many Switches can be stacked with WS-C2960S-48FPD-L at a max..
As per my Knowledge it is 4 and as below..
Switch 1 to Switch 2 Switch 2 to Switch 3 Switch 3 to Switch 4 Switch 4 to Switch 1
If yes then, is it mandatory to do the "Switch 4 to Switch 1" stack. why am I asking this is because this stack requires a long cable and the cable which comes with the Switch is only 0.5M.
My company is beginning to have a lot of sites were we are stacking 3 to 4 C2960S-48 switche.This is making "show running-config" very very long because of the 4 x 48 interfaces.I can’t find a CLI command that show me the running-config of a ranges of interfaces. If I for example would like to see running-config for switch 3 (interfaces 3/0/1-52)The Show Running-config will show all the interfaces (for the two first swtiche = 104 interfaces), which take a time before I reach to switch 3.I miss a CLI command like: show Running-config switch 3, or module 3, or show running-config interface range x/x/x-x ?I’m well aware of the CLI command show running-config interface x/x/x, but this will only show me one interface.
We have been set the task of securing a small managed office system which is currently set up with a standard switch allowing each of the offices (containing different companies) to see each other, and in some cases, access each others documents across the network.
Obviously this is a far from adequate set up and our aim is to isolate each office using VLAN's but share a common internet connection provided by the managed offices. We have two Cisco SGE2000-G5 layer 3 switches but we are new to Cisco equipment and VLAN's so we are not quite sure on how to implement this. DHCP would need to be provided by a Router, there is no Server. We are open to suggestions on the Router as we have yet to purchase one.
I have two 3750x stacked switches , both with the latest firmware on them. I enter the configuration onto one switch and it obviously copies over onto the other switch. Although in the configuration I have both a console username and password and an enable password, when I try to log onto the initial switch that I entered the configuration on, I am prompted for a username and password, which works fine, but when I try to enter enable mode i get an error stating that no password has been set. However when logging onto the other switch I am not prompted for a username or password but when I try to enter enable mode I am prompted for a password and can access it with no problems.
Are there any best practices for preventative maintenance on Catalyst Chassis switches. Looking to build a PMI schedule for a customer. Or is there evidence not to perform it at all. Things like re-seating line cards, cleaning fan exhausts, etc.
We have 3 SG500-52 switches that are stacked and configured for layer 3 that replaced a couple of SG2010 switches a month ago. Switch units 1 and 2 are for servers and unit 3 for the workstations. The switches are connected with stacking SFP+ copper cables, 1 1M and 2 7M cables. The problems are occurring between the workstations and servers resulting in slow traffic on some links and connection failures. A repeatable failure occurs doing a backup from a PC on unit 3 to a server on unit 1 and 2 (2 port LAG). Moving the workstation to a port on unit 1 results in successful backups every time.
Initially I was able to confirm packet loss between my PC (on unit 3) and the servers using ping (ping -f -c 100000 -s 1460) of about .1%. The iperf program in udp mode also showed some packet loss and in tcp mode showed slow connections. A week ago I then upgraded the switches from v1.2.0.97 to v1.2.7.76 and rebooted. After that the ping and iperf tests show no problems although there are still slow connections to samba shares and the backups still consistently fail.
I suspect there is a problem with the stacking connections and have searched for traffic statistics on the stacking ports to look for errors but have not found anything. Doing a snmpwalk didn't reveal anything that I recognized. There are interface counters for all the ports except the stacking ports.
Since I am a collector of all things Cisco, I picked up a Catalyst 5505 switch today. It has two supervisor engines in it, a card with 12 fiber ports in it, and two 24 port cards in it. I am trying to console into this thing, but I am not having any luck. I have Googled it and some threads say it uses a normal straight through cable and other threads say it uses the normal Cisco rollover cable. I tried going both routes but no luck?
I have 2x6500s series catalyst core switch. i configurated vss. all them are working normal. but i have one problem. some of my servers link is down sometimes. I configurated server links as etherchannel.at etherchannel not both of links down only one link down.this modules i used to connect servers to core switch. modules 3 and 7 slot.
Two days ago, a brilliant guy inserted a different ios in a Cisco Catalyst 6500 and erased the original ios. I have twice downloaded the original ios by xmodem (too much time!) and both of them, when I reload the 6500, it doesn't work: I have the following message:
loadprog: bad file magic number: 0x0 boot:cannot load "bootdisk:s72033-ipservicesk9_wan-mz.122-18.SXF11.bin"
Second time, when the ios uploaded, I checked the sup-bootdisk: and the flashboot: and both have the wrong ios listed, but it wasn't there: I've tried to delete it and squeeze it, but had a message saying "can't delete because the ios is not there" or something like this. I finished formatting both (flashboot: and sup-bootdisk:), tftp the ios, double-checked the bootloader, compared with other identical 6500 and reloaded again, just to find the same message I've written before.
Supervisor 720 PFC3B. Slots for disk0 and disk1 are broken or I can't read them from the rommon.
We are facing an issue with the NAM3.Version: 5.1(2-patch4)
we can not login using the GUI. when we try to login we are getting the following warning:
Initializing database. Please wait until initialization process finishes.(see attachment)
we have rebooted the NAM3 module but the issue is not solved. the NAM3 module is running on 6500 Series Switch.(Cisco Catalyst 6500 Series Network Analysis Module (NAM-3)
I've just made a purchase for a Cisco 2960 8 port switch ( Exact model: WS-C2960PD-8TT-L ), I reckon this is what I need to set up my network, so far I've gone through the Express Set-up and configured it through there with no problems. I've set up the hardware in the following manner:
-Internet Modem >Port 8 on Switch ->Port 1 on Switch goes to 1252 Cisco AP ->Port 2 on Switch goes to Linksys VOIP home Router
I let it start up and can connect to the internet through the AP, and through the router. (I'm posting through the AP-Switch set-up right now.) However, once I connect to the AP with a second client. It refuses to let the second client connect/not give an internet connection, as it would a direct connection to the modem.I'm going to assume this is due to NAT not being configured through the command line on the switch yet.
I want to upgrade a Catalyst 3560-48PS to the last IOS.I get an errormessage stating that there is insufficient space in flash: I have deleted all files in flash - but I still get the same error message. According to the documentation there should be enough memory. Messages are pasted below:
Switch#dir Directory of flash:/ No files in directory 15998976 bytes total (15997952 bytes free) Switch#archive download-sw tftp://192.168.9.13/c3560-ipservicesk9-tar.122-55.SE.tar Loading c3560-ipservicesk9-tar.122-55.SE.tar from 192.168.9.13 (via Vlan9): !!!!!!! [OK - 15964160 bytes] Loading c3560-ipservicesk9-tar.122-55.SE.tar from 192.168.9.13 (via Vlan9): !!!!!!!! examining image... extracting info (109 bytes)
[code]....
Error: There is insufficient space in flash: to install the required
Error: image. Clean up some old images, and try again.
I have a Cisco Catalyst 2940 switch, eight ports. Ports 1-4 are connected to a media converter A. Ports 5-6 and 7-8 goes to two separate servers, B and C. Let's say I want traffic from B->5->1->A then through some equipment (which just pushes the data) and back through A->2->6->C without the data just recognizing a shorter path B->5->6->C and thereby skipping the equipment in between. Is this possible without a router? Ridiculous set-up? Yes, though the switch is the only means I have to connect to the media converter in this case.
