I have a 3845 enabled for CDP connected to a stack of 3750 switches. From the router, i dont see any CDP neighbors. From the switch, i can see the router as neighbor. Why isn't the switch showing as a neighbor from the router side? [code]
View 3 Repliesi was just asking if it is possible to create a L3 etherchannel between 2 single 3750 switches that act as our core, (running HSRP for the vlan and with a port-channel between the two) and a new switch stack of 3750s that will be routed to and managed by another party. Only i'd like to have the redundancy of 2 links connecting the new stack.If it is possible are there any best practices or preference in using PAgP or LACP or just going for ON.
View 7 Replies View RelatedI have 3750 stack with 4 switches.I am trying to make change some port to new VLAN, but switch 2 & 3 new change never works, the ports stick with old VLAN. Other two switches works as I expected on new changed VLAN.Tried to reboot, no progress.
#Show VLAN command confirmed the VLAN changes are made.
#show switch detail
Current
Switch# Role Mac Address Priority State
--------------------------------------------------------
1 Member 0019.e752.xxxx 1 Ready
2 Member 0015.f9bf.xxxx 1 Ready
[code]......
I am running LMS 4.1 and have an issue with Inventory: I have a stack of four 3750 switches, but only two of them are showing up in CiscoView. If I right-click - Topology - Device Report ; I see all four switches. The switches are standard 3750 switches and should be included in the Device Packages for CiscoView
Also if I go Reports - Detailed Device ; I see the same two devices show up under Module Information. However when I go to Reports - Device Attributes ; I see all four devices correctly displayed.
I have tried and deleted and added the stack in CiscoPrime, but with same result.
I have two 3750 layer3 switches and I need to connect them via stack cable.so if I connect them with the stack they will be act as an one switch, but for the configuration if I create a VLANs on the master switch (applied all the configuration on the master one) this configuration will be transfered to the slave one or I have to repeat the configuration that I did on the master.
View 5 Replies View RelatedLooking for feedback from other organizations that have large 3750 stacks. I've got one stack of (8) 3750's composed of (6) 3750G's and (2) plain 3750's. This particular stack is usually unresponsive to SNMP queries and often fails to write config when we make changes. After a couple tries it will finally go. Part of my probably here is likely the plain 3750's that always boot faster and come up as the master. I should manually set the master to one of the G's. What I'm wondering is who else has 7-9 3750's stacked and are they performing well for SNMP, telnet, etc? I've got another newer stack of 7 3750E's that I need to add one more switch to. Need to decide if I want extended downtime to break the stack up or just add the 3750X to make member 8 and hope it performs well. I have 50+ 3750 stacks working great on our campus.
View 1 Replies View RelatedI am trying to do ios upgrade on 5 stacked 3750 switches. All the switches have different model number, so i am wondering which image file i should download. As far as i understand all the stacked switches should have the same IOS, i may be wrong. The switches have the following model numbers and SW images;
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
1 28 WS-C3750G-24PS 12.2(35)SE5 C3750-IPSERVICESK9-M
* 2 28 WS-C3750G-24PS 12.2(35)SE5 C3750-IPSERVICESK9-M
3 52 WS-C3750G-48PS 12.2(35)SE5 C3750-IPSERVICESK9-M
4 30 WS-C3750E-24PD 12.2(35)SE5 C3750E-UNIVERSAL-M
5 30 WS-C3750E-24PD 12.2(35)SE5 C3750E-UNIVERSAL-M
which image file i should use as they all have different model numbers and Cisco provides different image files for each model.
We have several stacks of 3750 switches where this problem is occurring. All of the switches are running IOS version 12.2(50)SE3. (Yes, I know it's old.)
We're seeing inconsistency in how the stack reports members when issuing the following commands:
sow switch
show version
show inventory
Not all members are showing up in the output of the "show version" and "show inventory" commands. For example:
HUNTI-WV-WDAC03#sh switch
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
1 Member 108c.cff2.ea00 15 0 Ready
2 Member 8cb6.4f0a.a600 1 0 Ready
*3 Master 8cb6.4f0a.9c00 1 0 Ready
(all three switches in stack are displayed)(code)
I am wanting to etherchannel from a 3750 stack to core Layer 3 switches (also 3750) with a cable going to each core switch, I have put both core switches and the stack under a 28bit subnet mask, but I dont seem to be load balancing across both links.
View 5 Replies View RelatedI have 3 3750 staking switch with the following configuration:
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
1 Member 442b.0350.9400 1 1 Ready
2 Member 442b.0357.8780 2 1 Ready
3 Master 442b.036f.a800 3 1 Ready
The new switch is installed to be wired to the master switch. the swtich 3 (* 3 Master Ready 442b.036f.a800)my question is: if you disconnect the wiring from the master stack to connect to the new switch, it is possible that the new switch change the current configuration of stacking.
-Can I just add the new switch with clean configuration without changing the current configuration ?
-How is assigned the stack number? i need the new switch be with the GI4 / x?. I can I manually by assigning ports?
-If I want to the new 3750 member witch lower prioridad, can I change priority before adding to stack?
I have 2 switches c3750 which I want to install in stack to replace two Nortel switch that I have in production.
When connecting my new stack of cisco switches to a cisco router c3750 to 2600, they begin to restart by itself. I mean, There is a cisco router 2600. which I want to connect to the stack of switches. The problem is that when the switches connect to the router it begins to restart.
If you need to see the running config of the cisco Switches or the 2600 router.
before I open a TAC case: How does Cisco Prime NCS handle the device licenses for stack of 3750 switches? Just one device license for the stack or a license for every physical switch in the stack? I can't find a answer on the Cisco website, but maybe one of you knows it from a deployment you have done..
View 2 Replies View RelatedWe have got 2 3750 switches in the stack which are connected to access switches with 2 uplink ports . each 1 uplink from each physical stack switch .
Due to some power issue our member switch got rebooted. After the reboot the access switches were not reachable through ping , but i was abe to see access switches in "show cdp neighbour" . Then i rebooted the master switch and member switch one after other . after which i was able to ping the access switches.
IOS Version : c3750-ipservices-mz.122-35.SE5.bin
I have been given 2 x 3750 switches that were a stack, I need to keep the configs on both but how do I make them individual switches again and remove the stack info?
View 3 Replies View RelatedLets say i have 2 3750 switches stacked via backend stack cables. Now if a packet needs to go from 1 switch in the stack to second switch in the stack, will it travel via stack cable or do we need to connect both switches via uplink ports (ethernet or sfp). I tried reading datasheet but it no wheres mention the actual frame path between switches in stack.
View 3 Replies View RelatedI'm thinking about using a 3750 stacking around 4 or 5 switches intead of using one 4500 series switch.
1-My first argument was concerning the budget (one 4500 instead of four or five 3750 in stack mode) ---- Here i think 4 or 5 stacked 3750 is cheap than one 4500
2- My second argument was about harware redundancing that i don't have with one 4500 and that i have with stack mode ----Here i have more hardware redundancing with 3750
3- The bug that we notice today in 2960 and 3750 and not in 4500
4- Simple to manage a 4500 compare to 3750 stack design
5- I was looking also for the one with best backplane ----Here i didn't have any infos concerning the best backplane between 4 or 5 stack 3750 and a 4500.
6- I'm also looking for power redundancing.
I have an issue with a Cisco 3750 switch stack which is connected to two seperate upstream Cisco 3750's which are administered by an ISP. The ISP is experiencing MAC address flapping from one of my VLAN SVI's i am using to route traffic upstream
[code]...
As you can see I utilise a VLAN SVI to route traffic to the upstream 1.1.1.2 (illustration only) IP. As per the diagram of the topology attached, the ISP is receiving a MAC address flapping error confirming the SVI MAC address from my switch stack is being learnt on the trunk port connecting switch 1 and switch 2, and also the port (Gi1/0/48) directly connected to my switch stack. As these are all Layer 2 links essentially being passed upstream and then connected between the two ISP switches, we have a 3 way triangular loop formed.
If I was to remove the port channel configuration from the two ports associated with the VLAN SVI, am i right in suggesting this would still form a layer 2 loop? The two ports would still be a member of the SVI VLAN, and it is the VLAN MAC address which is being learnt by the two ISP switches on different interfaces.
Is possible connect and configuring two cisco wlc in high availability to 3 switches in stack 3750 in difference ports?For example
WLC A (Primary) - SWITCH MASTER
WLC B (Secondary) - SWITCH SLAVE
How can i connect the wlc's in HA to get a redundancy in the stack?
I configure 3750 stack switch as core and 2960 stack switches as access layer switches.I connected my laptop to one of my core stack in VLAN 10 and I am pinging to one of my server in VLAN 1. What will be the minimum latency at the time of inter VALN routing
View 2 Replies View RelatedI've been fighting what seems to be an increased number of outqueue drops on our core stack and edge switches for the last 3 or 4 weeks.(The core consists of a stack of 5 3750s in 32-gig stack mode. The wkgrp switches are 3560s. all are at 12.2.52) The wkgrp switches are directly connected to users. We use Nortel IP phones with the phone inline with the user PC. auto-neg to 100/full. [code] However I have tried turning off QOS on a couple of workgroup switches (no mls qos, but left individual port configurations the same) but am still seeing drops.Since I have disabled qos on the switches in question (no mls qos) (not the core tho) I am presuming these commands have no affect on the switch operation and therefore cannot be related to the problem. With QOS turned off one would presume that it is general congestion - especially at the user edge where busy PC issues might contribute. So I wanted to see if I could see any instances of packets in the output queues building up.
I wrote some scripts and macros that essentially did a snapshot of 'show int' every 20 seconds or so, and looked for instances of 'Queue: x/' where x was greater than zero.What I found after several days of watching the core stack, and a few of the workgroup switches that are most often displaying the behavior, was that I NEVER saw ANY packets in output queues. I often saw packets in Input queues for VLAN1, once in a great while I would see packets on input queues for fa or Gi interfaces, but NEVER on output queues. [ code] Additionally, when I look (via snmp) at interface utilization on interfaces showing queue drops (both core and wkgroup), they are occurring at ridiculously low utilization levels (as low as 4 to 8%). I've tried to look for microbursts between the core and a wkgroup switch where the core interface was experiencing drops, but haven't seen any (using observer suite). [code] While the queue-drop counts aren't critically high at this point, they are happening more frequently than in the past and I would like to understand what is going on... In most cases, no error counters are incrementing for these interfaces. Is there some mechanism besides congestion that could cause output queue drops?
I have installed NM-1T3/E3 IN A CISCO 3845 WITH IOS c3845-advipservicesk9-mz.124-9.T3.bin AND 512 MB RAM .WHEN I ENABLE THE CARD THE CPU PROC HISTORY SHOWS 100% WHEN DISABLED IT COMES DOWN TO 10%
Slot 0: C3845 Mother board 1GE(TX,SFP),1GE(TX), integrated VPN and 4W Port adapter, 7 ports Port adapter is analyzed
Slot 2: NM-1T3/E3 (clear/subrate) Port adapter, 1 port Port adapter is analyzed
Which is the best way of creating GRE Tunnels on a GLBP enabled router? I actually have two 3845 with GLBP configured as our gateway routers, and need to create gre tunnels to branches.The plan is to use the GLBP virtual IP as the Tunnel Source address and the branch WAN interface as the tunnel Destination address, how do i handle the Tunnel IP address? Do i create the same Tunnel on both gateway routers and have a glbp virtual IP address for the Tunnel Interface as well?
View 4 Replies View RelatedWe currently have as our stack master a 24 port Non-PoE that we want to replace with a 48 port Non-PoE. The 48 port switch at one time was provisioned as switch 3 in the stack (not the master). Correct me if I am wrong, but theoretically all I should need to do to get this working is to shut off the existing master so it re-elects a master and then provision the 48 port switch as the new switch one and make sure switch 1 has a high priority?
Do I need to write erase the switch that is replacing the current master first?
I have client who has two distant offices with 3750 L3 as core (do all vlan routing for local office) and multiple L2 access switches with multiple VLAN’s connected to it. First 3750 is hub also connected to internet, second 3750 is spoke and acting as a router on stick. We have eigrp configured on both side ISP provided client 100Mbps link as a trunk with two vlan; vlan10 for voice and vlan20 for data. We assigned two small subnets to these vlans 10.15.17.0/29 and 10.15.17.9/29. Hub addresses are 10.15.17.1 and 10.15.17.9 respectively. How to force voice over VLAN10 and data via vlan20, but still do some load balancing? How to setup default route on second (router on stick) switch?
View 1 Replies View RelatedI have 2 PE routers connected to each other via 2960S and 3750 (non-metro) switches:
[PE1] -- [2960S] -- [3750] -- [2960S] -- [PE2]
I will be sending voice and data traffic between the two and my voice traffic will be marked DSCP EF & EXP 5.
Since the 2960's and 3750's can't match on the EXP bits, I am wondering if the "mls qos trust dscp" command still works. Is the 2960/3750 able to match on DSCP even though there's an MPLS header on top of the IP packet?
I'd like to avoid having to tag my VLAN traffic on the PE and rely on COS to achieve QoS in this case.
A specific switch port which happens to be part of a 2 switch 3750 Switch Stack is seeing multiple CDP packets from 3 extra switch port interfaces that are not directly connected. Noteworthy is that the far end devices have the correct CDP entries and I physically confirmed at least two of those connections that lead to the switch "upstream to the culprit switch". Tricky part is that its production so room for maneuvering is limited. At some point I disabled all Ports save for the real uplink and the problem momentarily disappeared. Re-enable the interfaces problem resurfaces. Is there an explanation, technique to eliminate the culprit with minimal disruption?
View 4 Replies View RelatedI am troubleshooting a fiber connectivity issue.Now I have two switches, one is 3750, and another is small biz 300 series switch. Both switch has a single mode smf gbic. Now I have two swtiches face to face and connect with a single mode cable. Do you think if I would get a link light on? Both ports are no shutdown.
View 3 Replies View RelatedI have enabled SSH on my 3750 switches and notice that https is not working. Iam not sure they are related but seems to be oddly coincidental. Therefore find it diffficult to monitor using CNA 5.7.6.
configs are given below
gvadc-sf01#sh run | i ip http
ip http server
ip http access-class 11
ip http secure-server
From my machine, i should normally have access to https running on the switch but isnt the case..
Do I need to generate a new crypto key separately for https?
I've been trying to figure this out for some time now. I have a network setup with a couple of users, as well as a few servers. I'm using a 3640 as my border router that is connected to a 3750 with L3 routing enabled. I am using the IOS firewall in the 3640 and am having problems with downloads and connections in general on the LAN. Downloads will start at fast speeds (~1MB/s) but after a short time, it will begin slowing to a crawl or idle. I have disabled my ip inspect rules and found that the downloads will function at full speed for the entire download.
I've looked over the router configs several times, and I don't see anything unusual. Is there anything I should be looking for? I would like to think that this router can handle the traffic of about 5 computers.
I would like to apply a policy-based route on one of our L3 switches (Cisco 3750) to change the next-hop of a couple of servers only. The VLAN where those servers reside got WCCP enabled on it. When I want to apply the route-policy to that VLAN interface it doesn't let me. When I try to apply the same policy to a VLAN interface without WCCP it does work. Is there any Cisco IOS limitations that would prevent me from doing that?
Configuration:
route policy config:
access-list 70 permit ip host x.x.x.x (server IP)
route-map PBR1 permit 10
[Code].....
My WAP4410N is configured with 4 seperate SSIDs. Two of the SSID status are showing "Enabled". The other 2 are shown as "Connected". The one that are showing as Enabled are not receiving any packets. Devices connected to the SSID that shows "Enabled" are unable to connect to the network. Any one else encountered similar issues before? This issue just surfaced few hours ago. The device has been using for around 2-3 years with minimal issues.
View 1 Replies View RelatedWe have a 3750 acting as the core. By default IGMP snooping is enabled on cisco 3750 from the documents.but, when we see the ip mroute table on the switch, it doesnt show any output.
View 40 Replies View RelatedI looking to buy SGE 2010 swith, but I have some question:
1. Can I use 4 SFP ports and stack of two switches at the same time.
2. Is it possible to use for stacking ports other than 24, 48?
3. What is maximum possible number of ports to use for stacking (can I get more than 1Gb thruput).