Cisco Routers :: RV180 Running Base Firmware (1.0.0.30) Don't Support Jumbo Frames
May 28, 2012
I've enabled jumbo frames in Networking -> LAN (Local Network) -> Jumbo Frames on an RV180W running the base firmware (1.0.0.30).The switch seems to pass jumbo frames just fine (like ... almost every switch these days), but the router itself silently drops jumbo frames.ss this a known bug?This makes enabling jumbo frames on clients impossible, since it will break some external connectivity. (I.E. when two endpoints are on networks with jumbo frames, they will then negotiate a high MTU over the WAN, but the router will silently drop large frames and they won't get an ICMP Fragmentation Needed, etc. because the router simply drops large frames).
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.
Can any ASA 5500 in particular the ASA5510 firewall support jumbo frames (i.e. greater than the default standard 1500 Bytes frames)?. I plan to use the ASAs to setup a point-to-point IPSec tunnel and need an Application frame of 4Kbytes intact and not segment it.I have done little checking on the Cisco Website and see it mention of Jumbo frames on the 5580 on 10Gig interface but didn't see mention 5510. 5580s are way over-kill and expensive for what I need is to run a mission critical one IPSec point-to-point with maximum of no more than 100Kbps so 5510 is perfect for me but not sure if it can carry the jumbo frame?
On the routers and switches it's the MTU settings and they are configurable per interface and I am OK and the circuit is T1 which the Telcos said it's OK since it's physical layer so the only unkown is the firewall.
I have two switches: Nexus 3064 (ver 5.0(3)U1(2)) and Cisco 6509.The 6509:
1 x WS-x6708-10GE 8 port Ten Gig module version 3.5, firmware 12.2(18r)S1. 2 x sup 720's, with PFC3A. 2 x WS-x6348-rj-45 4 x WS-x6748-ge-tx
The IOS is ipservicesk9-mz 12.2(33)SXH8b.Both switches have been running fine for quite a while(not connected to each other). I then ran a fiber connection between port Nexus:1/48 and 6509:Te9/1.When I ping (of any packet size) from the Nexus to the 6509 @172.19.4.254, the 6509's CPU goes to 100%. On occasion, we will get 1 out of 20 packets back in the reply.I reduced the MTU size on the three 6509 parameters until the CPU stopped going 100%.The magic number is 4175 bytes. 4176 and higher == 100% CPU.I am willing to put the fiber link to 1500, but how does one change that for just one port on the Nexus? I tried and it refuses to set the mtu. I also tried to setup a new service-policy but that didn't seem to work either.The Nexus users are all jumbo frame users. The users on the 6509 are all 1500 byte frame users, except for one user on a 1 gig port (ws-6748-ge-tx) line card. It is this user whom would like jumbos.
What am I missing - can't get my new SG 200-08 Switch to handle Jumbo Frames
I have set the MTU size to 9216, saved the conf. and rebooted the box - however when I try to "ping -f -l 8000 xxx.xxx.xxx.xxx" through it (or to the switch itself) I recieve only "Request timed out"!?
I have tried MTU=9000 as well.....
F/W: 1.0.1.0
Is there anything, apart from increasing the MTU size, that needs to be done?
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.
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 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 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.
The server team has asked me to implement jumbo frames on a single VLAN, the one they use for v motion. We have two pairs of 5548s, each pair running VPC for most connections. I am aware of many postings that describe how to enable jumbo frames globally, like this:
policy-map type network-qos jumbo class type network-qos class-default [code].....
I am not clear how I can extend this principle to one VLAN only.
Also, I am aware of a posting [URL], that shows some pitfalls of implementing jumbo frames in a VPC configuration. Pretty well all my connections are VPC, including all the FEXes, which are all dual-homed. In many cases, the VPC extends through to the servers so that the servers run port.channels across two FEXes. I am unclear whether the pitfalls are still valid, or whether I have to wait until my next maintenance slot (6 months away) to implement jumbo frames. Can jumbo frames be implement safely on the fly? How does enabling jumbo frames fit in with "conf sync" mode?
We have a number of sites which have high-speed L2 links which terminate on our L3 switches at each site. The ports are between the sites are placed in routed mode.
I would like to use Jumbo frame between two of the network which will communicate across sites and 1500 mtu on the rest, is this something which is possible?
From my understanding is the mtu is set on the interface therefore if I set the mtu on the L2 link ports on both sites to 9000 then would this cause a problem for the 1500?
We are currently using two Nexus 5548UP's as our Datacenter Network Core. I have a pretty simple objective: I would like to enable Jumbo Frames on a single VLAN only(VLAN 65). This VLAN is used strictly for backups. I do not want to enable Jumbo Frames on the other VLANs(VLANs 1-10). Im not sure what the best way to do this is.....or if it is even possible but I am hoping to get some configuration examples.
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 noticed if you add more than 10 access rules to the Access Rule table, you are unable to reorder past the first 10.Steps to reproduce:Create 11 rules of the same stream direction, outbound or inbound (...I found the bug with outbound, did not test inbound).try to reorder one of the first 10 rules to the end of the list, either by entering "11" manually, or by pressing the down arrow.System responds that "11" is an invalid number, or that the rule cannot be moved.This issue is not reported in the "Known Issues" section of the release notes for 1.0.1.9.
I'm considering upgrading a small business to the newly released RV180 or RV180W.Does the RV180 series support 6rd (IPv6 rapid deployment?).I see 6rd documented in the other small business routers (e.g. RV110), but I can't find it in the RV180 documentation.
I'm currently using DynDNS for my Dynamic DNS Provider with the RVS4000, but I'm looking at upgrading to the RV180 and switching my Dynamic DNS provider over to DNS Made Easy since I can get all my DNS hosting under one roof. Does the RV180 support DNS Made Easy in its Dynamic DNS client? If not, could it be added in a firmware update?
How do I submit an RFE (Request For Enhancement) to the Cisco SBR team to encourage them to implement the missing support for VLAN to VLAN firewall rules that was available in the RVS4000 (See [URL]) and that was supposedly added to a beta release of the RV220W firmware (See [URL])?
I am unable to isolate DMZ and LAN traffic with an SA520 running 2.1.7.1 firmware. I have the optional port configured as DMZ and DHCP server enabled. I tired leaving the firewall as default. Also tried creating firewall rules to deny traffic from LAN to DMZ and DMZ to LAN for any address and any service.I am still able to ping devices both from LAN to DMZ and DMZ to LAN. I am also able to see network resources in both directions.
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 am trying to update my F5D7234-4 G Wireless Router - Firmware and I am told No known program will open this file. This file is part of a program. What do I do?
We will deploy several 4507 with 2xsup7 as a L2 access switches for our office.Does LAN_Base IOS version support SSO or we need purchase IP_Base IOS (L3)?
I am currently trying to decide on the best remote support software to purchase for a 50+ workstation business. I have experimented with Real VNC and TeamViewer, and whilst they are quite comparable I noticed that TeamViewer has a feature called "Seamless Windows" I will be providing remote support to local users, and several interstate branches - therefore the software that I decide on must accommodate a wide diversity of geographical locations.I was also looking at a product called GoverLAN, but it seems to me that GoverLAN only works on a single LAN and can't be used over a WAN in a similar way to both RealVNC & TeamViewer?
I'm trying to work out if I need to order the "IP services" image for a couple of C3750-X. I need to run OSPF on these switches, but find the IOS image requirements on Cisco contradict.
At the top of the data sheet it says: • Open Shortest Path First (OSPF) in IP Base image
On the product info page it says: IP Base: Enterprise Access Layer 3 Switching, including OSPF (Open Shortest Path First) for routed access
But in lots of other places it says you need 'IP services' for OSPF.
As the IP services IOS is quite a bit more expensive I would like to avoid buying it. What image do I need to run OSPF?
