Cisco Switching/Routing :: Configure Ethernet Jumbo Frame Setting In A C6509E Switch With WS-X6548-GE-TX?
Jun 25, 2012
I would like to configure Ethernet jumbo frame setting in a C6509E switch with WS-X6548-GE-TX and WS-X6516A-GBIC port modules, and IOS 12.2(33)SXJ1. whether any of these modules can support jumbo ethernet frames up to 9000 per port bases.Also, if none of these modules support port-based jumbo frame MTU then would the switch allow jumbo frames on Ethernet trunks from an access switch (say a C3560)?
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.
I have a pair of N7K's in vPC topology with some FEXs attached. I am looking into enabling Jumbo frame on the N7K as well as the FEX. I understand Jumbo frame is enabled globally by default.
My question is I have some interfaces in a port-channel that I need jumbo frame enabled. Do I enable it at the port-channel interface or at the physical interface ? and is the change disruptive to the network ? I am running NX-OS 6.0.2.
I currently have 4 3560 switches connected in a Mesh topology. These are all set to use Jumbo Frames and so are all the Servers that are connected to these.I now need to connect a 2950 switch to 2 of the 3560's which will have only desktop computers connected to it but i do not want to configure Jumbo Frames on this and any of the desktops.
I attempted to enable jumbo frames on a Nexus 5010 (NX-OS version 4.2(1)N1(1)). I created the policy map below and lost access to the switch.
policy-map type network-qos jumbo class type network-qos class-default mtu 9216
After recovery I see from the logs that all vlans and interface were suspended. I've attempted to look for reasons for a compatibility issue but I am unable to find what is checked and what could have been incompatible. The other troubling thing is the adjacent switch suspended its interfaces too but no change was done there. What I need to look out for so that this does not happen again?
2011 Nov 22 23:43:09 phx-ipcg1dwfcma %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs 1,10,601 on Interface port-channel1 are being suspen ded. (Reason: QoSMgr Network QoS configuration incompatible) 2011 Nov 22 23:43:09 phx-ipcg1dwfcma %ETHPORT-5-IF_TRUNK_DOWN: Interface port-channel1, vlan 1,10,601 down 2011 Nov 22 23:43:09 phx-ipcg1dwfcma %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs 10 on Interface port-channel508 are being suspended.
I'm receiving multicast traffic (400Mbps) on port 9/38 and sending it out on port gi9/48. I'm trying to achieve that traffic will stay within the card without using the switchfabric,
We are buying some C6509Es with Sup2Ts and 8 port 10G cards. Would like to get a close estimate of the power consumption for our configured chassis. Does C6509E have at least the following components that can share their show power output.
Catalyst 6500 Enhanced 9-slot chassis 14RU no PS no Fan Tray1Catalyst 6509-E Chassis Fan Tray1Catalyst 6500 24-port GigE Mod: fabric-enabled with DFC41C6K 8 port 10 Gigabit Ethernet module with DFC4 (Trustsec)1Catalyst 6500 Dist Fwd Card DFC416908 10G baseboard1Cat6500 6000W AC Power Supply2Cat 6500 Sup 2T with 2 x 10GbE and 3 x 1GbE with MSFC5 PFC42Internal 1G Compact Flash2Cat 6k 80G Sys Daughter Board Sup2T PFC42Catalyst 6500 Supervisor Engine 2T Baseboard2Catalyst 6500 2GB memory for Sup2T and Sup2TXL2
i have an issue to connect a trunk between cisco switch and extreme switch i have many vlans that i want to cross via a link between cisco 3750 switch and a Extreme Alpine 3800 switch
I'm setting up an Ethernet network of Rockwell Stratix switches (badged Cisco 3000 series with extra firmware) and need a switch to obtain a gigabit port to a server as the Stratix switches only have 2 gigabit ports per switch and the network is in a ring. The Ethernet ring is in fibre and I would want copper to the server. The switch would need REP (Resilient Ethernet Protocol) to be compatable with the Stratix set up. Is the ME 3400G-2CS AC a workable option?
The question is: Will a 3750 switch route Jumbo frame sizes (e.g. 9000 MTU)?
We know that we can change the System MTU to 9000, and someone on a previous thread said that we can change the Routing MTU to 9000 as well, although I couldn't figure out how to do that. However, regardless of how we configure the System MTU and Routing MTU, I don't think we're able to adjust the MTU on L3 VLAN interfaces, so if we want to actually "route" between VLANs on the switch, we're limited to 1500 MTU.
Our situation is that we have a customer connecting to our 3750 switch, and this customer wants to use Jumbo frames. The customer connects to our 3750 switch via their own VLAN, with their own L3 VLAN interface configured on the switch. The customer will point their traffic towards the L3 VLAN interface, then we want to route them onto another VLAN, via a different L3 VLAN interface, before forwarding their traffic. Because of the limitations noted above, specificially regarding the routing between these VLANs via L3 interfaces, I do not think we'll be able to support 9000 MTU frames on this 3750 switch. I think the L3 VLAN interfaces will limit us to 1500 MTU, regardless of what we configured via the global System MTU and Routing MTU settings.
I am setting up a new 2960-S switch and none of the recommended username and passwords combinations work. I have tried CIsco Cisco, <blank> cisco and various other permutations.
I have tried to reset the switch to factory defaults and it still doesn't work. The switch is currently connected to a 3560G and has been assigned an IP. If I try to access it from Network assistant it shows as unmanaged and I get prompted for a username and password.The switch is connected to another new 2960-S via a FlowStack module.
I'm trying to set up a 2951 with a 24 port switch module. I want the ports to act similiarly to the ports on an 881 router - where I assign the VLANs on the router and I set the VLANs to the switchport interfaces.I would like to be able to create the VLANs on the router portion of the 2951 and then, enter the switch module and configure the Ports to the VLANs but, how do I logically connect router to the switch? Is it an internal logical interface - meaning how are the VLANs getting from the router to the switch?
I am trying to set up a network that has 1 internet connection, requires a local LAN for the business, and another LAN for public wireless access. Here is what I have and details on what we want to do.
We have the main LAN set up and all is working well, internet access, 6 WAP's connecting and all is working like a charm. Internal IP range is 192. 168. 0.0/24.We have all 6 WAPs on the internal network, with 2 SSID's on each WAP and each SSID is assigned to a VLAN. One SSID is internal for staff, the other is for guest access for members. The internal staff wireless access is working fine.
We want the guests to be able to access the internet, but not the internal network, but we need to access them for administration from the internal network.
We created a second VLAN on the switch and added the 6 WAP ports to it as tagged for VLAN2. These 6 ports are also on VLAN1 (default). We have a second VLAN on the router, have it handing out DHCP addresses for the 192.168.25.0/24 range with DNS servers.
Where we are having trouble is with getting the guests wireless access to work. Guests can see the wireless, log onto the access point but that's it. They don't appear to get a 192.168.25.0/24 IP, or any IP actually, and thus cannot do anything.
I have a Nexus 7000 plus 6 boxes NX2000 on backbone.I have configured on 7000 :
conf t system jumbomtu 9000 exitERROR: Ethernet111/1/1: requested config change not allowed ... ERROR: Ethernet122/1/48: requested config change not allowed 1/111/14 is a NX2000 port conf tinterface ethernet 1/111/14 switchport mtu 9000 exit
I have gotten this message : Error: MTU cannot be configured on satellite port(s) - Eth122/1/11 ?I have tried on a NX7000 TP port:ERROR: Ethernet10/45: MTU on L2 interfaces can only be set to default or system-jumboMTU ?Does JUMBOMTU configuration can be done only when there are no NX2000 configured ?
I've to enable it on 3750 and nexus 7K switches. what are the steps involved? can we enable jumbo frame per port instead of enabling globally? i.e. we will only have few ports that will be using jumbo frames, rest of the ports will be using default 1500 MTU size.
on some of our ports on Nexu 5000 and on the connected FEX we can see a lot of Jumbo Packets though there is not enableed any JumboFrame on the Switch, all Interface and system MTU is set to 1500.
DBE-LINZ-XX41# sh int Eth113/1/27 Ethernet113/1/27 is up Hardware: 100/1000 Ethernet, address: d0d0.fd1b.b69c (bia d0d0.fd1b.b69c)
We have a requirement to send span traffic to a destination port for monitoring purposes on two 5000s with some 2000 fex boxes attached. Some of the servers are making use of frames larger than 1500. we have not changed any mtu configuration on the 5000 since installation, and I can see the policy maps is still on 1500.
My first assumption would be that frames larger than 1500 will not be dropped, but it seemingly not (see below). is there a reason why the switch would forward jumbo frames? Also, is there a limitation on MTU for span traffic? There is a MTU command under the span session, but the maximum is 1518. From what I can read the frame will be truncated if it exceeds this. Does that mean the fragments will be dropped?
I got one SF 300-48 layer 3 switch I tried to configure to use it in the office network.Unfortunately I'm unable to configure the VLAN settings.I need port one for input(VLAN2),port 7-15 for another vlan(vlan3) also need to connect with the vlan 4.port 15 is another vlan(vlan4) this is for wireless.Other ports are static.It doesn't get any connections with other vlans.I wish to know how to configure vlans in GUI mode.I tried , But I can't get the Vlan setting correctly.Also,I need to know how to communicate both vlans in GUI mode.
configure qos in Cisco 3750 switch.I have configured below template and applied on the vlan interface.But i am getting the hit on the access list but I am not able to get hit on the class map.
I am trying to configure a new 2960 POE switch, but seem to me the int fa0 is layer 3 interface. Is any way we can convert it to a switchport, so we can connect it to other switch in trunk mode?
Currently all the cisco phones are connected to this switch and configuration with only one vlan that is voice vlan .
1) what is the outcome of this configuration , i mean, what will be the expected output ? end of the day we need to prioritize the voice traffic but why other commands including threshold and buffers are mentioned with respectives queues , if I need to explain that what am i expecting out of this configuration ?
2) this is LAN QoS which i understood but again , do i need to configure policy-map along with class-map which is MQC on this switch ?
3) i have edge router where i have MQC already configured but confusion with this switch which is working as a Access switch .
4) I referred the cisco QoS document for the respetive model whereas we have policy-map configured on the same switch with class-map .
My understanding is if we have configured the LAN QoS , and mapped the CoS value with DSCP , we need not to have MQC.
I believe i've enable jumbo frames on our Nexus 7010, one in each data-centre.
system jumbomtu 9216. Also on the interfaces mtu 9216. And can see MTU 9216 bytes, BW 20000000 Kbit, DLY 10 usec on the port-channel between them. Though when i ping between vlans at each site with large packets i get 30% drops and if i set the DF bit in IP header to yes - 100% loss.
8798 bytes from 10.200.12.2: icmp_seq=19 ttl=254 time=8.024 ms --- 10.200.12.2 ping statistics ---20 packets transmitted, 14 packets received, 30.00% packet loss
I understand that jumbo frames need to be enabled end-to-end. I have two ESX hosts connected at each site. I want to enable jumbo frames for those ports, but what if not all host on the ESX are using jumbo frames, will I have drops and connection failures? So if i have two sites, each with a 6509 connected via a trunk and need to enable jumbo frames for a vlan between the sites how do I accomplish this?If I enable jumbo frames on the trunk link how does that impact other traffic between the sites?
I have a switch that I have configured for jumbo packets, but they don't seem to be functioning. I have set system mtu jumbo 9000. The hosts are connected via 2x EtherChannel links. The hosts are jumbo frame enabled, and can ping their own local address using jumbo packets & do-not-fragment flags on the pings. They cannot, however, ping each other or the switch that way - it always says that the packet requires fragmentation. I know the attached machines (they're all VMs) and virtual switches support jumbos because I can ping within the virtual interfaces of the VMs. It's just traffic that goes over the switch that fragments.The switch is a WS-2960G-48TC. Here are the various outputs, with a section of config at the end.
hrnacancwtdevs3#show system mtu System MTU size is 1500 bytes System Jumbo MTU size is 9000 bytes System Alternate MTU size is 1500 bytes Routing MTU size is 1500 bytes
I have a Cisco Nexus 3064 that I am using as part of a flat network for the Lab. I have 30 Virtualization Servers(MS HyperV and VMware vSphere) connected to this switch and I want to enable jumbo frames. The Virtualization Servers are able to ping the local VM's using 8K bytes. However I am unable to ping from server to server using 8K bytes. I have configuration (in abbreviation). All the servers are in the same network which I configured as L2 ports with the "switchport" command. However, the interface "MTU" command is unavailable in L2 mode. I am only able to get the interface "MTU" command only in L3 mode with the "no switchport" command on the interface.
# int eth1/2-45 # no switchport # mtu 9216 # no shut
I can ping the servers with less than 1500 bytes, but anything larger fails.
I have a Cisco Catalyst 3100 blade in a Dell server chassis that is trunked to a 6509.
When doing a protocol capture, I see large frames being sent from one of the servers in the chassis.
Example:
TCP:[Continuation to #1701] [Bad CheckSum]Flags=...AP..., SrcPort=HTTP(80), DstPort=2667, PayloadLen=2831, Seq=1489611217 - 1489614048, Ack=1719592331, Win=65535 I see lengths up to 6900+ bites coming from the server.
The switch has the global MTU set to 1500
system mtu routing 1500
and I can't seem to set this at the interface level. The server is configured to send 1500 length frames. Why am I seeing these jumbos? (the server is Windows 2003)
I have a pair of Catalyst 3560 GB switches that are trunked with two of the standard ports, and that have trunk ports connecting to a failover pair of PIX 515e's. We're considering adding a pair of cluster database nodes and an iSCSI SAN, both of which would need a dedicated interconnect VLAN that I'd like to employ Jumbo frames on. I don't necessarily need the VLANs to traverse the firewall trunks since they're private interconnects, but I need each host to traverse the switch trunks.
Since it seems I can only enable Jumbo frames on the entire switch (current standard frame size is 1500 and jumbo is also 1500), when I enable it what kind of possible negative impact could this have on my trunked ports as well as my host connections? I've read mixed reviews of users with iSCSI SAN devices seeing terrible performance when enabling jumbo frames so I'm apprehensive about enabling them on an existing network.
