CMTS uBR10012+RF-Switch N+1 Redundancy

Hello,
I need to know how to cabling a CMTS uBR10012 to a RF-Switch, when we are using four RF modules MC5X20S on the CMTS, to provide the 3+1 Redundancy.
There is only one document about RF-Switch Cabling, but it describes the cabling only for ONE RF module (http://www.cisco.com/en/US/tech/tk86/tk804/technologies_white_paper09186a00802cd675.shtml)
Please, everything about this issue is welcome.
Thanks.

What is the RFswitch type u r using?there are several RF switch types.If u r using uBR 3x10 RF switch, then I think the following link will provide you with a detailed sketch on cabling between this RF switch and the uBR10012 CMTS router.
http://www.cisco.com/en/US/products/hw/cable/ps2929/prod_quick_installation_guide09186a00801da7d5.html.
If this is not the RF switch model u use, then mention the name or model of ur RF switch type.Hence, I can provide u with a more appropriate document.

Similar Messages

Switch and Router Redundant Network

I am trying to learn as much as possible about networking and cisco. I trying to build the following network to practice redundancy. I set up HSRP on my routers because it the only protocol available on packet tracer. The following setup works but how would I go about adding the vlans to switch ALPHA and switch BETA. I would like to use access list for security, for example Sales can't access Accounting but Accounting can access sales. I can do that with one layer 3 switch but how do I do it with 2? Do I add the same VLans to both switches? Should the configurations to both switches be exactly the same? Because I tried that and for some reason the Vlans could not communicate unless I changed the interface to dot1q and trunk mode. I thought it be easier to change all interfaces at one time but when I tried that STP failed. I tried setting only the interfaces being used to dot1q and trunk mode on one switch it worked but as soon as I did it for the other STP failed again. Read layer 3 switches can have HSRP but seems like a waste of a switch. Ive looked online and can't seem to figure it out. So my question is how do I set this up, I would like to add hosts and a server later but I can't even get this to work. Hopefully someone can help me out with this as I find it very interesting and am eager to figure it out.

Ok thanks again John. I will set that up as soon as I can. But the issue I was having don't know if its because of HSRP not configured but when I did identical configs on both switches I couldn't ping between Vlans unless I changed the interface, for example the interfaces between Sales to Alpha then Alpha to Marketing, using the command
Switch(config-if)#int f0/?
Switch(config-if)#switchport trunk encapsulation dot1q
Switch(config-if)#switchport mode trunk
for both interfaces.
It worked ok until I did the same thing for the interfaces between Alpha and Beta then STP turned off and everything started blinking. But I had to because I couldn't get to Accounting without doing that to Beta since STP blocks ports and sends traffic through Beta also.The I tried using the same command on all the interfaces for Vlan switches Sales, Marketing, Acc instead of Alpha or Beta to try something different and same thing happened. Not sure if you know why its happening? Wrong interface encapsulation or mode on either side? needed HSRP?
Basically if I change all interfaces on Alpha and Beta to dot1q and trunk mode STP fails or if I change all the interfaces and the bottom switches to dot1q and trunk mode everything also fails.
I guess I try what you said first if it fails I show you what I'm talking about.
Thanks,
John

Redundant Switch Configuration

I'm trying to setup two Catalyst 3750X-48T-L switches to support redundant networking. Most pieces of equipment will have two Ethernet interfaces, each on separate subnets.
So far, I've got the switches configured as separate VLANs, connected together with stack cables as shown below. I can propagate Ethernet traffic in each subnet/VLAN independently. However, I cannot get packets routed across the VLANs/subnets.
I'm looking for guidance on what additional steps are needed. Do I need to define each port as a trunk connection?

If you want to route between the vlans then you need to have L3 vlan interfaces (SVIs) on the switches.
So for each vlan you need to create an SVI and assign it an IP address from the IP subnet used for that vlan.
Then you set the default gateway of the clients in that vlan to the be the SVI IP address.
Note - if your switches are stacked you only need to create the SVIs on the stack master.
Edit - haven't used 3750-X switches so you many also need to enable IP routing using the "ip routing" command.
Jon

WiSM redundancy, mobility groups and RF groups

Hi there
we would like to implement the following:
- Support for about 2000 LAP's
- 1 x Catalyst 6509
- 1 x Sup 720
- 7 x WiSM's
What I'm interesting is are the following points:
1. I thought that we would build the switch completly redudant, so we have to wlan switches (switch A and B) with 7 WiSM's eatch. So I can garanty a N+N redundancy --> each LAP's has a primary controller on switch A and it's secondary controller on switch B. The LAP's can be splitted on the two switches, but for your understanding there is a 1:1 redundancy. What do you think of this design, is the too much or is this appropriate?
2. As I know you can build up a mobility group of a maximum of 24 controllers or 12 WiSM's. I would put only these controllers in a mobility group, where Layer 2 roaming can occure.
3. But what is about the RF groups - there is a maximum of 1000 LAP's, so I can put only 3 WiSM's in one group. But this would not work form me, then I would have 2 WiSM's on switch A and only 1 WiSM on switch B in a RF group (not a 1:1 redundancy). First is it possible to put WiSM-A and WiSM-B into different RF groups, I think so because they are logically splitted, aren't they?
And what RF group design would be best (just as a reference)? I thought that it would make sense to form a RF group for each of the seven pairs (1 WiSM on switch A and 1 WiSM on switch B) for redundancy? What do you think of that approach?
4. So I would have 1 mobility group and 7 RF groups. Or do you recommend to form the mobility groups like the RF groups? But what happens with Layer 2 roaming in that case?
I'm sorry for the long and messy text, but I hope you can see my design questions?
Thanks a lot in advance.
Dominic

It sounds like you already have some good replies. Personally I like N+1 redundancy, but that is a designers choice. One thing I should point out is that the 6500 can only support 5 WiSM cards each. In this case a 4 WiSM x 3 chassis option would give your more spare capacity with only 12 total cards. The lower WiSM cost (12 vs 14) would help offset the cost of the extra chassis. You could also support 2400 APs with 8 WiSM cards even if one switch is down.
Not too long ago Cisco added the ability to set the priority of APs so your critical ones would join a controller and the less critical ones would go down if a controller failed and there were no redundancy. That is something to keep in mind when designing wireless. You may not need redundancy for all APs and that could affect your design and costs.
Randy

OCR Disk - change from external to normal redundancy

Hey, I am using grid 11.2.0.3
I have one +OCR Disk in ASM configured. unfortunately with external redundancy.
I have two storages - each storage is representing 2 disks á 500 MB
But I think that my cluster will break down, in a case of a storage failure. Is that right ?
Can I switch to normal redundancy ? If not, how to modify the configuration.
I could create two new disks, and could create a new diskgroup for OCR. But how to switch ?
Is it the ocrconfig replace command ? Or with a backup ?
ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 3032
Available space (kbytes) : 259088
ID : 419542868
Device/File Name : +OCR
Device/File integrity check succeeded
Device/File not configured
Device/File not configured
Device/File not configured
Device/File not configured
Cluster registry integrity check succeeded
Logical corruption check succeeded
ocrconfig -showbackup
2011/11/04 05:48:57 /crs/cdata/bfkoe/backup00.ocr
2011/11/04 01:48:57 /crs/cdata/bfkoe/backup01.ocr
2011/11/03 21:48:57 /crs/cdata/bfkoe/backup02.ocr
2011/11/03 17:48:56 /crs/cdata/bfkoe/day.ocr
2011/11/03 17:48:56 /crs/cdata/bfkoe/week.ocr
PROT-25: Manual backups for the Oracle Cluster Registry are not available

Christian wrote:
Hi, would this the way to replace my diskgroup
srvctl stop database -d <database>
ocrconfig -manualbackup
ocrconfig -showbackup manual
crsctl stop crs [-f] on all nodes
ocrconfig -delete +OCR
#Remove ASM Diskgroup
oracleasm deletedisk OCR1
oracleasm deletedisk OCR2
oracleasm deletedisk OCR3
oracleasm deletedisk OCR4
#Remove ASM Header
dd if=/dev/zero of=/dev/mapper/vot1_agg01_part1 bs=1024k count=200
dd if=/dev/zero of=/dev/mapper/vot3_agg01_part1 bs=1024k count=200
dd if=/dev/zero of=/dev/mapper/vot2_agg02_part1 bs=1024k count=200
dd if=/dev/zero of=/dev/mapper/vot4_agg02_part1 bs=1024k count=200
#Re-Create ASM Diskgroup
oracleasm createdisk OCR1 /dev/mapper/vot1_agg01_part1
oracleasm createdisk OCR2 /dev/mapper/vot3_agg01_part1
oracleasm createdisk OCR3 /dev/mapper/vot2_agg02_part1
oracleasm createdisk OCR4 /dev/mapper/vot4_agg02_part1
Recreate +OCR Diskgroup via asmca with normal redundancy and mount diskgroup on all nodes
ON node 1:
crsctl start crs -excl -nocrs
ocrconfig -add +OCR
ocrconfig -restore <file_name>
ocrcheck
On node1:
crsctl stop crs -f
On node2:
ocrconfig -repair -replace
On node1+node2
crsctl start crs
cluvfy comp ocr -n all -verbose
Does this look right ?
Christian
Looks complicated, I would suggest have a read http://download.oracle.com/docs/cd/E11882_01/rac.112/e16794/votocr.htm#CWADD91099
Cheers

SWITCH and CASE STATEMENT

i am trying to use switch statement for drawing different shapes by clicking shapes buttons (eg line ,rectangle oval etc) . i have got a method called setDrawMode and i am passing shape value as parameter to this method but nothing happen .all it is doing is drawing with default value.
my code for clicking button:
String s = event.getActionCommand();
if (s.equalsIgnoreCase("LINE"))
{   mycanvas.setDrawMode(0);}
else if (s.equalsIgnoreCase("RECTANGLE"))
{ mycanvas.setDrawMode(1);}
else if (s.equalsIgnoreCase("OVAL"))
{ mycanvas.setDrawMode(2);}my setDrawMode method:
public void setDrawMode(int mode)
switch (mode)
case LINE :
case RECTANGLE:
case OVAL:
this.mode = mode;
break; default:
throw new IllegalArgumentException();
}my code for paint method:
public void paintComponent(Graphics g)
super.paintComponent(g);
if (numPoints>0)
for (int i=0; i<numPoints-1; i+=2)
switch (mode)
case LINE:
g.drawLine(p.x,p[i].y,p[i+1].x,p[i+1].y);
g.drawLine(p[numPoints-1].x,p[numPoints-1].y,cx,cy);
break;
case RECTANGLE:
g.drawRect(p[i].x,p[i].y,p[i+1].x,p[i+1].y);
g.drawRect(p[numPoints-1].x,p[numPoints-1].y,cx,cy);
break;
case OVAL:g.drawOval(p[i].x,p[i].y,p[i+1].x,p[i+1].y);
g.drawOval(p[numPoints-1].x,p[numPoints-1].y,cx,cy);
break;
values for shapes
int LINE = 0
int RECTANGLE = 1
int OVAL = 2
please help
khurram

what is the point of this switch here?
public void setDrawMode(int mode)
     switch (mode)
         case LINE :
         case RECTANGLE:
         case OVAL:
         this.mode = mode;
         break;
         default: throw new IllegalArgumentException();
} This dosn't do anything but asign mode to the global mode, which is why you get the same value every time. You need to do something in the switch and you don't have a break between them so they would all execute anyway. You can try this.
public void setDrawMode(int mode)
     switch (mode)
         case LINE : this.mode = 0;
         break;
         case RECTANGLE: this.mode = 1;
         break;
         case OVAL: this.mode = 2;
         break;
         default: throw new IllegalArgumentException();
}But if your just trying to set a global mode you could just ommit the switch because its redundant
public void setDrawMode(int mode)
       this.mode = mode;
       // then you could call paint however you call it
       paintComponent(this.getGraphics);
}

ISE redundant NICs

Hello All,
does somebody know or point me how to configure redundant NICs on ISE Appliance SNS-3495-K9?
There can be only configured rudundant mode for CIMC, but not for the rest. I want to use Etherchannel or Bonding active-standby, to have the appliance connected to switches for more redundancy.
I haven't found anything like this in documentation and I cannot believe, that Cisco will not support this feature on theri appliances.
Thanks!
Karel

Hello,
the only document I found regarding the NIC redundancy is as follows:-
Step During boot up, press F8 when prompted to open the BIOS CIMC Configuration Utility. The following screen appears.
Step Set the NIC mode to your choice for which ports to use to access the CIMC for server management (see Figure 1-3 on page 1-3 for identification of the ports):
–Dedicated—The 1-Gb Ethernet management port is used to access the CIMC. You must select NIC redundancy None and select IP settings.
–Shared LOM (default)—The two 1-Gb Ethernet ports are used to access the CIMC. This is the factory default setting, along with Active-active NIC redundancy and DHCP enabled.
–Cisco Card—The ports on an installed Cisco UCS P81E VIC are used to access the CIMC. You must select a NIC redundancy and IP setting.
Note The Cisco Card NIC mode is currently supported only with a Cisco UCS P81E VIC (N2XX-ACPCI01) that is installed in PCIe slot 1. Refer to the following section in the Cisco UCS C220 Server Installation and Service Guide: Special Considerations for Cisco UCS Virtual Interface Cards.
Step Use this utility to change the NIC redundancy to your preference. This server has three possible NIC redundancy settings:
–None—The Ethernet ports operate independently and do not fail over if there is a problem.
–Active-standby—If an active Ethernet port fails, traffic fails over to a standby port.
–Active-active—All Ethernet ports are utilized simultaneously.
For furhter details please folloe the link below:-
http://www.cisco.com/en/US/docs/security/ise/1.1.1/release_notes/ise111_rn.html

Blocked Stack Ports on 2960X-48FPD-L Stack (Unstable Switch Stack!) Spanning Tree?

I am having an issue where 2 2960X-48FPD-L Switches in a redundant flexstack (stack port 1 SW1 to port 2 SW2 and port 2 SW1 to port 1 SW2) ring.
At first running the 15.0(2).EX5 (and earlier EX3, and EX4) version IOS yielded all the ports on the stack master switch refusing to run spanning tree and would only link in amber and not pass any traffic other than CDP information (the slave switch linked in fine).
I upgraded to 15.2(3)E and this solved the problem of the ports not linking in green and participating in spanning tree.
Now, however, about every week or two I lose connectivity to the switch stack and I was able to go to the switch stack locally and found that for some reason the switch stack is blocking and unblocking VLANs on StackPort1 frequently (see below). When I was at the site, I sometimes had connectivity, sometimes not. A stack hard reboot brought everything back up, but this is the second time this has occurred and I would expect the same problem in the next week or so.
Has anyone else run into these issues, and have you found a solution?
I'm guessing that if I either get rid of the redundancy on the switch stack or stack using Ethernet cables between switches the problem will go away, but then what is the point of using stackable switches in a non redundant low speed stack. It seems to me that Spanning tree thinks that I have a spanning tree loop going on with the stack ports which I didn't even think was possible.
What do you think?
Jim
_BAD_TLV: Received SSTP BPDU with bad TLV on StackPort1 VLAN1.
Mar 11 09:02:59: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking StackPort1 on VLAN0307. Port consistency restored.
Mar 11 09:03:16: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on StackPort1 VLAN1.
Mar 11 09:03:27: %SPANTREE-2-BLOCK_PVID_PEER: Blocking StackPort1 on VLAN0307. Inconsistent peer vlan.
Mar 11 09:03:42: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking StackPort1 on VLAN0307. Port consistency restored.
Mar 11 09:03:46: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on StackPort1 VLAN1.
Mar 11 09:03:47: %SPANTREE-2-BLOCK_PVID_PEER: Blocking StackPort1 on VLAN0307. Inconsistent peer vlan.
Mar 11 09:04:12: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking StackPort1 on VLAN0307. Port consistency restored.
Mar 11 09:04:22: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on StackPort1 VLAN1.
Mar 11 09:04:56: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on StackPort1 VLAN1.
Mar 11 09:05:13: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 207 on StackPort1 VLAN307.
Mar 11 09:05:13: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking StackPort1 on VLAN0307. Inconsistent local vlan.
Mar 11 09:05:30: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on StackPort1 VLAN1.
Mar 11 09:06:00: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on StackPort1 VLAN1.
Mar 11 09:06:04: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking StackPort1 on VLAN0307. Port consistency restored.
Mar 11 09:06:32: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on StackPort1 VLAN1.
Mar 11 09:07:02: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on StackPort1 VLAN1.
Mar 11 09:07:03: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 207 on StackPort1 VLAN307.
Mar 11 09:07:03: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking StackPort1 on VLAN0307. Inconsistent local vlan.
Mar 11 09:07:34: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on StackPort1 VLAN1.
Mar 11 09:07:45: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking StackPort1 on VLAN0307. Port consistency restored.

Jim,
We have also the same problem with our 2960-X switches (access) connecting to a pair of 4500x (VSS) except our issue is with Portchannel with 2 physical links connecting the 2960xs to the 4500.
If we disconnect one of the physical links from the portchannel everything works fine, but when we connect the same physical link back all users lose connectivity and the physical link starts flapping. Here are some of the messages we see in the logs when both physical links are in the portchannel:
Mar 10 18:00:43 EST: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 1 on Port-channel5 VLAN90.
Mar 10 18:00:43 EST: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel5 on VLAN0001. Inconsistent peer vlan.
Mar 10 18:00:43 EST: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel5 on VLAN0090. Inconsistent local vlan.
Mar 10 18:00:58 EST: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel5 on VLAN0001. Port consistency restored.
Mar 10 18:00:58 EST: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel5 on VLAN0090. Port consistency restored.
Mar 10 18:01:29 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to down
Mar 10 18:01:37 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up
Mar 10 18:01:48 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to down
Mar 10 18:01:51 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up
We have upgraded to 15.0(2a).EX5 and still have the same issue.
We have a ticket open with Cisco and have sent them all the logs and debugs and waiting to hear back from IOS developers.
HTH

Spanning Tree Redundancy Design

I am getting ready to deploy a redundant design using 3 3750's running emi software for a core and 2950's for distribution layer and access layer both. The 2950's with fiber attachment will be dual distribution switches providing a redundant link for every switch. My question is that if I set the "stacked" 3750's as the root bridge in stp, I thought it would be to my advantage to set the distro switches to 4096 and 8192 to make sure that stp take the correct path. Should I let stp take care of itself? Please consult the diagram and I appreciate any input. Thanks.

I would set the root id on the 3750's to 4096 and set one of your distribution switches to 8196 as a backup. Now I am assuming you are not doing load balancing or vlans either; so with that in mind after you set your root id, I would let STP take care of your redundant link between your distro switches and access switches. After STP chooses the links, then you can go back and set cost to the interfaces if the traffic flow is what you want. Make sure you enable rapid pvst+ on all your switches.
Here is a good reference to follow as well.
http://www.cisco.com/en/US/customer/products/hw/switches/ps5023/products_configuration_guide_chapter09186a00801cdee4.html#1082107
Frank

Help me to choose Right Core switches and Edge switches as per my Spec

Dear All
Please help me to choose Core and Edge switches and all required hard ware and software.
the spec details as per below
Core Switches
1. High performance, highly scalable core switch to provide multi-10GE connectivity to various segments in the network.
2. Switch should have redundant switch fabric and routing engines or management / supervisor modules
3.should have separate control and forwarding planes
4.Each switch should have redundant power supplies in N+N or N+1 fashion
5. Must allow for two spare slots once services, management, processing modules and line cards populated
6. Easy to manage firmware- i.e. single code type enterprise/service provider) or train, and robust operating system
7. Supports for the VRRP, NSR, GRES, BFD, STP, MSTP, RSTP, VSTP, LACP redundancy protocols
8. Hot plugging and removal
9. The switch should have native switching architecture with up to sufficient performance such that the loss of one switching fabric should not lead to degraded performance
10. Switch should support switching at least 400Mpps
11. Switch should be able to support 40 10Gig line rate ports in a fully redundant configuration
12. Chassis that can scale to 700 Gbps
13. The proposed Backbone switch should support, but not be limited to the following Layer 3 features:
Static ip routing
Routing information protocol (RIP) and RIP2
Open shortest path first (OSPF)
IGMP v1, v2 and v3
IGMP Snooping
IP multicast routing protocol
14. The switch should support the following features at a minimum:
Spanning Tree 802.1D, 802.1S, 802.1W
GVRP
802.1x single and multi-supplicant: VLAN and ACL assignment
Dynamic ARP Inspection (DAI), DHCP snooping, IP Source gurard
LLDP, LLDP-MED
802.3X, 802.3ad
Redundant Trunk Group (RTG)
IGMP snooping
Unicast static, OSPF v1/v2, RIP v1/v2
Multicast IGMPv1/v2, PIM
Graceful Route Engine Switchover

I have gone through your document and I am surprised to see MORE information in the document than what you've posted. I am so mildly suspicious about the authenticity of the document and spreadsheet you've attached.
So far, based on this document, the client wants a chassis that can support up to 700 Gbps backplane. The only candidate, other than a full-blown Nexus solution, is the 6807-X.
Next, the document also states dual supervisor card with two spare slots. Good luck trying to get that much empty space on a 6807-X. This means 6509E. You can't use a 6513E because of line-card-to-slot limitation.
If you look under the heading "Edge Switching", the first sentence already makes references to 6800ia switch.
There's also a reference stating that the product should have a 100 Gbps backplane. You can take the 6509E chassis out of the equation.
So you see, I am suspicious about the authenticity of the document. I agree with mali's and devil's recommendation that if you are serious, you would be engaging Cisco SE/AM in your region. There are only three reasons, that I can think of, why you've posted this here. One of them is the intended purpose of this document (and the audience).

Single Switch for multiple clusters

We currently have multiple independent RAC clusters, each with a low cost switch for the interconnect.
For example server1 and server2 is the development RAC. Server3 and server4 are the test RAC
and server5 and server6 are the production rac.
Can a single 24 port switch handle the interconnect traffic for these 3 separate RACs?
We will have a second switch for redundancy, but can the single switch handle the traffic for
3 separate RAC clusters?
Sincerely
Dan Clark

Can a single 24 port switch handle the interconnect traffic for these 3 separate RACs?That depends on the number of nodes in each cluster, and the redundancy of the Interconnect.
If you are running a single cable from the HCA on the node into the switch, your switch can support 24 nodes in total. If you are running dual connections, then only 12.
Performance.. well, I doubt that it will be a problem as a 24 port switch is designed to handle 24 connections. As the Interconnect needs to be fast, this switch is not a normal switch, but one that supports higher speeds and bigger pipes like Gig ethernet or Infiniband for example.
On the latter you can use Sockets Direct Protocol (SDP) or SCSI RDMA Protocol (SRP) - which is significantly faster than UDP (which is considered the faster protocol itself in the IP suite).
In your shoes, my biggest concern would be redundancy. If that switch fails for whatever reason, 3 clusters are down. And that is IMO unacceptable. I would instead consider either a more expensive switch with inbuilt redundancy (dual CPUs, PSUs, etc), or look at using 2 switches (which is a saving of 1 switch for 3 clusters).
Remember that RAC is only as good as the h/w architecture. If that is not adequate ito redundancy (or performance), it is clearly going to be shown by RAC itself.

4500 vss how to factory reset both switches

I need to factory default a pair of 4500 switches in VSS mode.
This is how I plan to do it.
1. on switch 1 execute redundancy force-switchover
2. write erase on the switch 2 and reload
3. this should failover to switch 1
4. write erase in switch 1
Is there anything I missed? Should I remove
Maybe I should do a switch convert mode stand-alone on both switches and then do a write erase on both?

1. Configure the config-registry to 0x2101. Reboot the entire chassis.
2. Once the chassis reboot, both cards should boot up without reading the startup-config file.
3. Go into configuration mode and change the config-registry to 0x2102.
4. Exit configuration mode and erase the configuration using the command "wr erase".
5. Don't forget to delete the VLAN.dat file.

Routing issue in Nexus 7009 due to vPC or hsrp

we have two site's, on first site we have two nexus 7009 switches (Nexus A & Nexus B) and other site is remote site having two 6500 switches. (design attached)
we are using hsrp on nexus switches and Active is Nexus A for all vlan’s
From one of my remote site user's (user's are in vlan 30 ) are not able to communicate with nexus site vlan 20 specially if host in vlan 20 take forwarding path from nexus switch B,
I can ping the vlan 20 both physical address's and gateway (vlan 20 configured in both nexus switch and using HSRP) from vlan 30 which configured on remote site 6500 switch
ospf with area 0 is the routing protocol running between both site.
vlan 10 we are using as a management vlan on both nexus switch that building neighbore ship with WAN router, it's means wan router have two neighbors nexus A and nexus B, but nexus B building the neigbhorship via a Nexus A because from WAN router we have single link which is terminated on Nexus A,
there is one layer 2 switch between nexus A and WAN router, nexus A site that switch port in vPC because we are planning to pull second link later to nexus B.
All user's are connected with edge switch and edge switch have a redundant uplink to nexus A and B with vPC configured
After troubleshooting we observe that if user in vlan 20 wants to communicate with vlan 30 (remote site), traffic is taking Nexus B is forwarding path, then gets drops.
I run the tracert from pc its showing route till SVI on Nexus B after that seems packets not finding route. Even vlan 30 routes are available in the routing table of Nexus B. we don’t have any access-list and Firewall between this path.

Hi,
I suspect in your scenario that traffic is being dropped due to the characteristics of vPC, the routing table on Nexus-B may reflect the next-hop address for the destination IP, however if that next-hop address is the address of the Nexus-A off of VLAN 20 then it will be forwarded across the vPC peer-link, this breaks the convention.
When you attach a Layer 3 device to a vPC domain, the peering of routing protocols using a VLAN also carried on the vPC peer-link is not supported. If routing protocol adjacencies are needed between vPC peer devices and a generic Layer 3 device, you must use physical routed interfaces for the interconnection.
You can configure VLAN Interfaces for Layer 3 connectivity on the vPC peer devices to link to Layer 3 of the network for such applications as HSRP and PIM. However, Cisco recommend that you configure a separate Layer 3 link for routing from the vPC peer devices, rather than using a VLAN network interface for this purpose.
Take a look at the following URL, this article helps to explain the characteristics of vPC and routing over the peer-link:
http://bradhedlund.com/2010/12/16/routing-over-nexus-7000-vpc-peer-link-yes-and-no/
Regards
Allan.
Hope you find this is helpful.
Sent from Cisco Technical Support iPad App

Command to block a port in Vlan

I have 3 switches interconnecting to each other. A PC in switch A wishes to ping to PC on Switch C. There are 2 paths leading to it, what command can i use to block one of the port so that there is only one path?
Is it setting one of the switch as root? Or is it something to do with portfast?
Note:Pulling out the physical link is not an option.

Hi,
By default, you have Spanning tree enabled on the switches and it should automatically block the redundent port. Use the command " show spanning-tree brief " command to check it is enable on the switch.
Based on the lowest bridge ID( Lowest MAC + Priority ) the switches will automatically calculate the root and once agreed upon that the root switch blocks the redundent path based on some calculation. If you want you can force a particular switch to be root switch by lowering dwon the priority which is by default 32768 for the switches. You can use command " spanning-tree priority in the config mode.
Portfast puts the port into forwarding state directly from blocking and thus skipping the intermediate states. It is generally used on host ports. Never enable portfast on the ports connecting to switches as it might results in a loop.
HTH,
-amit singh

Design Exercise - LAN Solution

I have an opportunity to gain employment with a network consulting firm. Part of the process is to take some information that goes through a mock RFP and come up with a design. It is an excellent way for them to see what I have to offer given all the channels available in coming up with a design. I believe in the process of collaboratoin and was hoping I could engage some willing individuals to work with me in creating a design for a LAN Solution, Wireless Solution and WAN solutions. I have until next Wednesday to put something together for a presentation next Thursday. So if you like practicing your design skills and would like to work with me on this excercise, I would greatly appreciate it.
The purpose of the excercise is not overerly technical in nature, but more high level. Here is the scenario:
Overview
The Widget International Group (WIG) is a prominent organization in the Upstate New York market. The WIG is looking to expand to a new regional office and build a new network. The network shall consist of high-availability, layer-3 routing, redundant, and fault-tolerant network equipment. Applications such as Voice over IP, Video over IP, WLAN, Voice over WLAN and possibly other leading edge applications may be utilized and, therefore, must be accounted for in this solution. The solution shall permit LAN segmentation via VLAN’s, and support VRF’s to avoid spanning tree issues. The solution shall support software modularity, to allow the switch software to be upgraded or downgraded with no service disruption, provide protected memory space for critical processes, and enable processes to be restarted independently of one another. Careful planning should be done to ensure that the WIG network has the flexibility to accommodate future applications. In addition to the solution parameters set forth in the following paragraphs, WIG would like the Contractor to review the overall functional requirements of the RFP and, coupled with the Contractor’s prior project experience, make recommendations on equipment and network configurations that may be overlooked in this document. All recommendations that are outside the requirements set forth herein, but may be of interest to WIG, shall be provided as an alternate solution and price. A separate Bid Form should be provided for each alternate solution and the Contractor shall state in their proposal which solution is most recommended for WIG and the reasons why.
The Contractor will be responsible for providing a turnkey design and installation solution based upon the parameters described. The design effort required at a minimum will include, but not be limited to:
Logical Network design presentation
Physical Network design presentation identifying all components to be sourced by Contractor or furnished by owner.
Description of diversity, redundancy and security aspects intrinsic to the design.
Identification of any impact the new design will have on existing environment configurations (i.e. redefining IP schemes). If it is prudent for WIG to make adjustments to their IP Schemes in their existing environment, then they will require support for this also.
Support for Open System Standards - The solution should be support open system industry standards, such as H.323, 802.1p and 802.1q, MGCP, SIP, TAPI, JTAPI, IPV4, IPV6, etc.
System Administration - Maximum flexibility for rapid, efficient, and cost-effective configuration changes, affecting personnel and associated IP telephone equipment through a standard browser-based interface.
LAN SOLUTION PARAMETERS
The complete data network core shall consist of two (2) chassis-based switches with redundant power supplies, two (2) supervisor-engines/CPU modules per switch and the appropriate quantity of line cards to support 10GB fiber uplinks to the edge switches in four (4) IDF closets. Uplink quantities are outlined in table 1 below. Core switches shall connect redundantly between each other, to the WAN equipment, as well as the edge switches in the respective TC’s. All 10GB uplinks shall be non-blocking. Edge switches shall be located in the TC’s in sizes and quantities required to support the number of users in that particular area. WIG desires a stackable edge switch.
There area total of 200 users.
10 Servers with basic services such as email, HR applications - CRM, and Active directory.

Hi Mheick,
since this is part of a hiring process, I don't believe this is the proper forum to ask for assistance. The potential employer wants to know what you would do.
Collaboration and team work are very important elements in the work environment but not for job placement. However, researching on the web or this forum to find useful information is all you need to do to develop your own solution.
And, if a company is expecting this as part of the hiring process, expect to be grilled over your RFP - if you can't validate your RFP and defend your choices .........
Best of luck. Regards,
Steve

CMTS uBR10012+RF-Switch N+1 Redundancy

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