Cisco Switching/Routing :: C3560E - EtherChannel Connected To Server Is Down
Apr 28, 2013
Two ports in C3560E are grouped together in "active" mode.These ports are connected to a EMC server. When I type as below, the channel is in SD mode. The Server admin told me that this is normal behavior since one port is active and the other is in standby mode of which are teamed together.
Switch#show etherchannel summ
...
Number of channel-groups in use: 1Number of aggregators: 1
Group Port-channel Protocol Ports------+-------------+-----------+-----------------------------------------------1 Po5(SD) LACP Gi0/33(I) Gi0/34(I)
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May 6, 2012
Recently I have faced following problem in my office, We have purchased two new Dell Server Power Edge R910 with built-in 10GB FC Network card. Service tag of this two servers are given bellow.
1. 7D94C2S
2. 6D94C2S
You can can Check specification of this two server from dell website{ URL}
We have two CISCO switch and model is given bellow:
Brand: CISCO
Model: WS-C3560E-12SD
We want to connect server to switch through FC cable and both switch have SPF module. But when we connect server to switch, link do not establish even switch and server port light become off.
Then we have tested the following things:
1. Connect server to server through FC cable, it is okay.
2. Connect switch to switch through same FC cable, it is okay.
I don't understand why it is not working.
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Mar 17, 2013
What is the difference between Operating temperatue & storage temperature of switch C3560E ?
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Sep 8, 2012
I have a network topology which you can see on image. All routers are Cisco 3745 with IOS (C3745-ADVENTERPRISEK9-M), Version 12.4(12). SW1 is L3- switch Cisco Catalyst WS-C3560E-24TD with IOS (C3560E-UNIVERSALK9-M 12.2(58)SE2). [code] After that I have problem. When PC with OS Windows 7 begins to work in corporate network, it sees "coflict ip addresses" and doesn't work with network. I've used wireshark and seen, when the PC send arp request a SW1 always send arp reply (see attached file). I think problem with command "ip sla responder", but I haven't searched information about it and I want understand this is bug or normal functioning.
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Apr 3, 2013
I've configured the DHCP server on a Cisco Switch C3560E as follows:
ip dhcp excluded-address 172.16.0.1 172.16.10.255
ip dhcp pool perth_main
network 172.16.0.0 255.255.0.0
default-router 172.16.10.254
lease 0 8
!
My goal was to limit the dhcp to the range 172.16.11.0 - 172.16.13.255, as there are not so many user on this network I so limited the lease time to 8 hours in order to "recycle" the unused addresses". What happend is that it is always using new IPs, even if the lease time has expired.
IP address Client-ID/ Lease expiration Type
Hardware address/
User name
172.16.109.90 XXXXXXXXXXXX Apr 04 2013 10:00 PM Automatic
172.16.113.106 XXXXXXXXXXXX Apr 04 2013 06:55 PM Automatic
172.16.113.122 XXXXXXXXXXXX Apr 04 2013 09:04 PM Automatic
[code]....
1. How can I force the DHCP server to recycle the unused IPs?
2. Can I specify a DHCP range (172.16.11.0 - 172.16.13.255) instead of an "excluded-address" range?
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Jan 11, 2013
In my organization we have several 2950T that conected each other. We have 4 floor with each floor have 1 sw except 4th flr have 3 sw.
Main server, apps, db ( 15 units) connected to core sw at 4th flr. Currently the problem is others devices can't connected to the server at core sw. Test ping and the network to core sw is intermittent problem. When ping 100 times only 30 reply. After 10 minutes the connection restored. Ping 100 times successful. It will not having problem again until the next day. This already happen 3 days. Any command for me to use to check if port or the switch having problem? Any log i can collect
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Aug 1, 2012
We have Dell M6220 blade server that server is connected to cisco 3750 switch. I am trying to configure LACP in 3750 for two port which are connected to Dell M6220 server switch. The channel-group 2 mode active commande is not taking then its showing the error protocol mismatch and if i run show int port-channel 2 command the port channel status is showing down. The Dell server switch is on simple mode. below i have attached the required details.
Switch#show int port-channel 2
Port-channel2 is down, line protocol is down (notconnect)
Hardware is EtherChannel, address is 0000.0000.0000 (bia 0000.0000.0000)
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
[code]...
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Oct 24, 2011
I have an Cisco 6500 CS and there is a Cisco Unified Communication Manger Server connected directly to the Core Switch.I tried to change duplex and speed ( fix and auto ) for both sides, but the same problem.
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Feb 23, 2012
Haveing issue with DHCP server handing out IP addresses to client connected to VLAN5 interface.ISP Router>Firewall -(WatchGuard Drop-in mode) I have several 3750 switches and one acting as a L3 switch. The L3 is configured as follow: [code]
If I connect a laptop to int fa1/0/10 I DO NOT get an IP address from the 10.100.0.8 scope. If I connect to another interface within the VLAN 1, I get an address from the 10.100.0.0 range.
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Apr 13, 2013
I am tryingto add a new VLAN on my C3560E Layer 3 switch for administration purpose.My goal is to make this VLAN for administration only and to let the administrators from 172.17.1.1 connect to any host of the internal network 172.16.0.0 plus exit to the internet via the default gateway 172.16.1.245.
Here an extract of what done so far:
ip routing
spanning-tree mode pvst
spanning-tree extend system-id
vlan internal allocation policy ascending
!
interface GigabitEthernet0/1
[Code]...
What happened is that:
1. The host connected to Vlan30 can correctly ping the interface it is connected to.
2, The internal network can access the internet
3. The host connected to VLAN30 cannot access the internet and cannot connect to any internal server.
Do I have to add a static route? This is a production envuironment and it is my first experiment with a layer3 switching in production, so I cannot mistake
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Jun 9, 2013
When I try to add an IP address to a port-channel interface on a 3845 ISR I am getting an error that seems to imply that only L2 etherchanneling is possible. Am I missing something?Cisco IOS Software, 3800 Software (C3845-ADVIPSERVICESK9-M), Version 12.4(24)T8,
sfo-c3845-1#sho run int port-channel 1
Building configuration...
Current configuration : 31 bytes
!
interface Port-channel1
end
[code].....
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Feb 3, 2013
I am trying to implement an etherchannel on a cisco 2901 (IOS 15.1). i have already created the port-channel but i cannot assign the gig interface to the channel group.
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Jun 11, 2012
I have a problem with an etherchannel between a cisco 2950 and a couple of catalyst 4506. The cisco 2950 is connect via an etherchannel to the catalyst 4506A. The channel consist of two port on both side and is in trunk mode, encapsulation dot1q.Now i have the necessity to connect the 2950 to the other catalyst, 4506B. So, i copy the same configuration on the 4506B, but when I unplug the two rj45 cables from the catalyst 4506A to plug them in the 4506B the etherchannel doesn't go up in any way.
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Mar 25, 2013
I have two switches 6509 one switch is confire with VTP domain ABC Other switch is configure with ABZ, At present the switch is configure with the L3 interface and one fiber cable is connected between two switches.I want to remove L3 configuration wants to make L2 etherchannel and wants to ceraeate Loop back will assing same ip both side.The OSPF is configure both side , i will not do any changes in the OSPF as L3 ip is advertise in OSPF.
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May 24, 2012
If the ports on a 5508 can only perform etherchannel(no LACP or PAGP), only on mode, how does a 5508 create a bundle with a nortel switch?
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Feb 28, 2012
I am about to configure 4 Gig ports for EtherChannel. I've been reading about EtherChannel and it seems easy enough to configure. I have a host (server)which I am going to connect to these 4 - gig ports. This is new for me and would like some feedback for those that have used EtherChannel on their layer 2 switches. The gig ports will be an access port with VLAN XX.
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Dec 6, 2011
Is it possible to have ether-channel across 2 switches? As an example, having a server with 2 ports connect, 1 port to Switch-A and the other to Switch-B and then use those two links on the sepatate switches but to the same server to form an Etherchannel.
The Switch-A and Switch-B are 3560 series
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May 19, 2012
We have two 6k5 configured as vss and it is working fine. For each floor we have a 3750 stack. In each 3750 stack we have 4 switches. From the first 3750 we have a fiber link to the first 6k5 and from the fourth switch we have another fiber link to the other 6k5 switch, for each floor/3750 stack, both configured as etherchannel. We installled each 3750 stack/floor in different maintenance windows; in all these installations we have problems configuring the etherchannel. After we configure the etherchannel on 3750 stack and in the vss, the etherchannel does not go up/up. We see the etherchannel up/down; after a lot off work, try and error, configuring shut/ no shut, adding and excluding links from the etherchannel; in any aleatory moment the etherchannel goes up/up and works fine. Is there any bug related with these IOS versions, or is there any right procedure to configure etherchannel from vss to 3750 stack?
3750 stack config (IOS
Cisco IOS Software, C3750 Software (C3750-IPBASEK9-M), Version 12.2(50)SE1, RELEASE SOFTWARE (fc2))
interface GigabitEthernet1/0/1switchport trunk encapsulation dot1qswitchport trunk allowed vlan 100,101,371,372switchport mode trunkchannel-group 1 mode on!interface GigabitEthernet4/0/1switchport trunk encapsulation dot1qswitchport trunk allowed vlan 100,101,371,372switchport mode trunkchannel-group 1 mode on!interface Port-channel1switchport trunk encapsulation dot1qswitchport trunk allowed vlan 100,101,371,372switchport mode trunk
[code]....
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Jan 31, 2013
I am trying to review the port-channel configuration on a 6500 series. I am issuing the "show etherchannel summary" command and the out put shows the Group, Port-Channel, and Ports. It does not show me the protocol that is in use such as PAgP or LACP. Does this have to do with the Etherchannel in the "On" mode rather than "active", or "Auto"?
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Nov 27, 2012
We have a problem with the throughput over etherchannel in LACP with 2 or 4 ports. It is iSCSI traffic (vmware esxi 4.1 U3) is going from 2 separate NICs (ports) to the etherchannel (with 2 or 4 ports) that has a SAN connected (Nexenta).
The SAN is configured in passive LACP and the switch is in active LACP. Actually it does not matter if we do LACP or just MODE ON, still same result: ~1GBit/s throughtput in either direction. Like already mentioned, 2 or 4 ports in the etherchannel make no difference, or the configuration of the etherchannel.
I will post some config data below, but here is the question: Why can't we see traffic beyond 1GBit/s? Source and destination are capable of doing much more than that (vmware esxi RAID 5 of 1TB SATA; SAN 16 x 1TB NL-SAS). If we look with CNA, we can see that the traffic is balanced equally over the etherchannel ports. With or without QOS or flowcontrol, no difference. This whole traffic happenes on this switch.
!
port-channel load-balance src-dst-ip
!
interface Port-channel5
[Code]....
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Oct 20, 2012
When you aggregate multiple fiber GBICs together on the 3508G, do you configure it as an etherchannel, or as fibre-channel? I've looked around online for hours, but can't find it mentioned anywhere.
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Jun 2, 2013
I have made an etherchannel between 6509 and 7606 with two giga interfaces on eatch one to have more bandwidth (2Go), but the Etherchannel does not exceed 1 GB (Below is a capture for Etherchannel taken from Solarwinds).the both 6506 and 7606 use ws sup 720 3bxl
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Jun 10, 2013
Is it possible to to build a Layer 3 ether channel from two separate physical switches (layer3) that are trunked together?I know you can easily do this on a single switch and on stacked switches which I've done but in this case the customer have purchased two 3560X's which are not stackable yet want redundancy. The purpose of the etherchannel is to connect both switches to a private circuit provided by the hosted partner then route to the same setup in the DR location to different subnets.
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Feb 17, 2013
seeking for configuration assitance on etherchannel between catalyst 3750 and 6506
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Jul 6, 2012
I was configuring link aggregation between a Cisco3750 and Cisco SG200 and the switched network went down just a few minutes after the port channel came on.I rebooted the SG200 and all hosts came back up for a minute before I lost them again. The etherchannel was between two trunking ports. I never set link aggregation on the SG200, could that be the reason? All machines are connected to the SG200. The 3750 is only being used as a layer 3 device for inter vlan traffic.
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Nov 4, 2012
Maybe this was listed in the release notes for the product and I missed it, but can this item support Etherchannel in a 2801 router? I installed the module into the router and the router recognizes the module. I can configure the ports as access or trunk ports, but I am unable to configure the channel-protocol or the channel-group for the Etherchannel. The IOS on the router is 15.1 M with the upgraded Bootloader version 12.3.
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Jun 20, 2012
We have a new building where we added 3 network closets with 3750x stacks.We have 2 fiber gig ports connected to 2 microwave units and etherchanneled the to ports
We have the same setup at the corporate office except the connection is 2 fiber gig ports on a 6509. The 6509 is doing the routing
Now the problem is that we lost the connection to the management interface on only one of the three closets after a few days running. But some workstations at the corp office could reach it... others could not. The workstation were on the same VLAN. We solved the problem for a few days by shutting on of the fiber ports on the etherchannel. But is started happening again... now with PCs being installed at the new location.
The PC that was not working on the 3750x side could ping across to the 6509 but no further then that. It seems like an arp issue not routing because some devices are reachable and fully operational throughout the network.
Here is the configuration:
3750x:Cisco IOS Software, Version 12.2(55)SE1
Current configuration : 118 bytes!interface Port-channel1switchport trunk encapsulation dot1qswitchport mode trunkno snmp trap link-statusend
!interface GigabitEthernet1/1/1description 2gig to STB-6509switchport trunk
[Code]......
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May 23, 2012
I been practicing with the configuration of layer 3 etherchannel configuration and i am facing a problem here. I have two 3560 switches and i want a layr 3 ether channel configuration setup between the first 2 ports of bothe the switches. I assign IPs to the Port-channel 1 of both the switches "10.1.1.1 /24 and 10.1.1.2 /24" but i am unable to get a successful ping. what am i doing wrong. below are the configs for bothe of my switches.
3560_1
Building configuration...
Current configuration : 1274 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
[code].....
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May 24, 2012
I would just like to confirm if it is possible to create a 2x10G etherchannel on a 4948.
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Dec 18, 2012
We have to cisco WS-C4900M with Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-IPBASE-M), Version 12.2(53)SG5, RELEASE SOFTWARE (fc1).We have four gigabit link connected between those two switches.We have create a LACP port channel with those four ports on both switches. Ether-channel is up and running and defined with a load-balancing method of src-dst-ip.But when we test the load-balancing, it's not using the src-dst-ip rule with the XOR: [code]
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Jun 4, 2013
I'm trying to configure and etherchannel between 2 switches. A 3750 and a 3750G, but the port channel is down: 3750. [code]
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Sep 26, 2012
on 7600 SUP720 3B.I have port channel and there are two ports on that port channel. is it possible to apply this command? does it work?
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Apr 23, 2013
We've installed cisco devices accross our site in the last year or so and slowing getting on top of it now. How ever our old unmanaged kit seems to be out performing it. It's most like down to my misconfiguration which has lead me to here. Below is the details of hardware and configuration between devices. 3750 Core consisting of the following stacked. [code] I've got MRTG monitoring traffic and the throughput seems to max out 24m/s,
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