Load balance on routers LAN and WAN

Hi ;
I have a setup where i need to implement load balance on 2 routers in both sides ,LAN and WAN , and there is ASA in the LAN side , my question is that when do load blance in LAN side using GLBP how the 2 ASA's will act on this because they will have only 1 default gateway IP address .
Thanks

Not Harbi
Not entirely sure i understand the question but i'll try to answer based on a few assumptions.
It sounds like you have a pair of ASA devices on the LAN side. Assuming they are in active / failover then they will appear as one IP address to the routers - a VRRP address. When the ASA arps out for the default gateway address they will get one of the virtual mac addresses back from the AVG.
They will send traffic to that mac address ie. they won't load balance.
The load balancing aspect comes in when another host on the LAN then arps out for the default gateway and the AVG assigns it a different virtual mac address tied to a different router. But as the ASA pair always appear as one host entity they will always be tied to one of the routers at any one time.
Hope this covers what you were asking
Jon

Similar Messages

Public LAN and WAN Addresses

Hi Guys
I am slightly confused about public lan and wan ips. We have a circuit that was installed a few months ago as a backup failover but we now want to start using it so I phoned my ISP for the public range for that circuit.
Now our internal IP subnet is a 192.168.150.xx
I was expecting the ISP to provide me with one public range maybe a /30 so I can assign an public ip to my routers external interface and PAT to that address.
The ISP instead gave me a public LAN and WAN address range both of which are public IPs. Can anyone explain what these are where in my type of network will they fit it
Thanks

As Peter says it is worth talking to your ISP but LAN addresses are usually simply another public IP block you are free to use however you want.
You don't have to use them and you certainly don't need to allocate them to physical devices on your LAN. The ISP doesn't really care how you use them either, they will simpy route traffic to those address to your edge device (see below for more details).
They can be useful if you host a lot of servers/applications accessible from the internet for example.
It does depend on the devices you have ie.
LAN -> firewall -> ISP router
in the above you use the WAN addressing for the link between the firewall and the ISP router and then you can just use the LAN address range for NAT on your firewall. Non of the LAN IPs need to be actually assigned to any interface
LAN -> firewall -> router -> ISP router
here you have your own router on the outside of the firewall. The WAN addressing would be used between your router and the ISP router. The LAN addressing would be used for the firewall to your router connection and any spare IPs can be used for NAT (usually done on the firewall).
Note that usually the LAN addressing is a larger subnet than the WAN addressing and as you say the WAN addressing is usually a /30. So the ISP uses one of the IPs from the WAN range and you use the other.
If you have been allocated LAN addresses then the ISP will route traffic to these addresses to the WAN IP you have used so make sure you use the WAN IP on either -
a) in the first example above the outside interface of your firewall
or
b) in the second example above the outside interface of your router, the one connecting to the ISP router.
Hope that makes sense.
Jon

Lan and Wan port on Airport express

Hi guys I am wondering if you could help me out with my airport express.
I recently bought an airport express and have it set up as the following:
Router--->ethernet cable in to the Wan of Airport express--->ethernet from Airport Express Lan to computer
This is so that I have hardwired internet to my gaming computer and wifi in my room for all my devices. The problem is, however, next year I will not be in a situation that allows me the same setup. I will be too far away to run an ethernet cable from the router to the airport express. So I have decided I shall use it to join the network wirelessly and relay internet through both the Wan and Lan port (think this is called bridge mode?). I was also intending on connecting an ethernet hub to one of the ports so that I can connect multiple devices, smart tv, macbook, ps3 etc. But having one of the ports exclusively to my gaming pc.
My question is, with both Lan and Wan ports relaying internet to multiple devices, would I see a drop in performance, in particular in regard to my compter? Or is the airport express able to join both the 2.4GHz or 5GHz and relay each connection to a specific lan port?
Unfortunately I am not in a position to test this yet, lacking a 5GHz connection in my halls, so I would appreciate if anyone could help shed some light.
Thank you

is the main router also an apple product? if so, then yes you can extend wirelessly, but if the main router is an apple product, why are you bothering to extend wirelessly at all when the main router's signals should be strong enough?
if the main router is NOT an apple router, then you wil NOT be able to extend it wirelessly period.
in my experience, there are very FEW places you NEED to extend a network wirelessly, and i always recommend against it since there is a big performance decrease.
In the case of a wirelessly extended network, throughput may be reduced to less than 60 percent of that of a single device.
http://support.apple.com/kb/HT4145

Which Monitoring Tool is best to monitor LAN and WAN

Hi,
CAN ANYONE TELL ME Which Monitoring Tool is best to monitor LAN and WAN.
Waiting for immediate response.
Thanks
Irshad

To start with HP open, this is SNMP-based as well. As it is around for quite a while and delivers support for many vendors, it has become sort of an industry standard. Many other vendors deliver add-ons (even CiscoWorks) to support their products via HP open. That functionality however comes with a price. If you have plenty of money an a large network to manage, HP open might be your best choice.
Cisco Works and other -start-with-C- products are typically used to manage Cisco devices. If you have a fair share of non-cisco boxes around you will find that you cannot see or do everything with them that you might want.
One special thing about CiscoWorks is that it lacks a grapical real-time overview of the network. In my opinion this is a weakness in the product. On the other hand, it has many nice features to manage all kinds of Cisco devices.
My ideal solution is to use both a generic SNMP manager, SNMPc in my case, and CiscoWorks 2000. With SNMPc I can quickly see network node status and do some bandwidth management (baselining). CW2k serves mainly to execute changes (NetConfig) and as a syslogger. It is also used to perform IOS upgrades and to store config files.
I guess this could be done with HP open as well, but our money does not reach far enough to pay for both. SNMPc costs a lot less, both in purchase and in maintenance.
Hope this clarifies things a bit.
Regards,
Leo

Data package size-LAN and WAN

HI Experts,
Could anybody give explanation/Document for the below query?
When transfering R/3 to BW.How the data pacakage size is determined.?Would the size of data packets be different over LAN and WAN? Why?
Thanks
Pradeep

In transaction SBIW -> General Settings -> Maintain Control Parameters for Data Transfer (in the OLTP System), you can see and edit the default values for the source system.
If you display the infopackage in the BW system and click on the menu option Scheduler -> DataS. Default Data Transfer, you will be able to edit the settings for the infopackage and also see what's the default configuration for the source system.
You may also consult the following SAP Notes for more information (including exceptions):
[417307 - Extractor package size: Collective note for applications.|https://websmp107.sap-ag.de/sap/support/notes/417307]
[409641 - Examples of packet size dependency on ROIDOCPRMS.|https://websmp107.sap-ag.de/sap/support/notes/409641]
I don't see what difference it could have over LAN or WAN, though...

Why would i connect a external hardrive to the airport extreme and what is the difference between LAN and WAN gigabit ethernet?

Hey just wanted to know what is the reason i would connect my external hardrive to the extreme and what is the difference between LAN and WAN ehternet. I know one is local and other is wide but can someone explain in simpler terms.

Connecting a hard drive to the Airport Extreme makes it available to be shared across all the computers on your network.
WAN (Wide Area Network) is your connection to the internet
LAN (Local Area Network) is your internal (or local) ethernet connections (computers, printers, etc...)
AirPort Base Station: About the WAN and LAN Ports

Load balancing weirdness using NAT and same-metric route

Hi.
I'm trying to set up a double-WAN load-balancing scenario:
I decided to attempt the "multiple same-metric routes with NAT" approach so I went for the example used in the IOS NAT Load-Balancing for Two ISP Connections Configuration Guide [1].
I decided to use an upside-down Cisco 871-SEC/K9: use Vlan1 and Vlan2 for the routers and Fa4 for the LAN. I am hoping this is not an issue.
There is this weirdness with some connections, particularly FTP. I pinpointed the problem to the following scenario: if I do a couple of pings to 100.1.1.1 using the FastEthernet4 as the source address, this is what I get in the logs:
=== PING 1 ECHO REQUEST ===
*Mar 3 04:38:43.521: IP: tableid=0, s=192.168.60.4 (FastEthernet4), d=100.1.1.1 (Vlan1), routed via RIB
*Mar 3 04:38:43.521: NAT: s=192.168.60.4->10.129.124.2, d=100.1.1.1 [14152]
*Mar 3 04:38:43.521: IP: s=10.129.124.2 (FastEthernet4), d=100.1.1.1 (Vlan1), g=10.129.124.1, len 60, forward
*Mar 3 04:38:43.521: ICMP type=8, code=0
=== PING 1 ECHO REPLY ===
*Mar 3 04:38:45.589: NAT*: s=100.1.1.1, d=10.129.124.2->192.168.60.4 [19824]
*Mar 3 04:38:45.589: IP: tableid=0, s=100.1.1.1 (Vlan1), d=192.168.60.4 (FastEthernet4), routed via RIB
*Mar 3 04:38:45.589: IP: s=100.1.1.1 (Vlan1), d=192.168.60.4 (FastEthernet4), g=192.168.60.4, len 60, forward
*Mar 3 04:38:45.589: ICMP type=0, code=0
=== (something else) ===
*Mar 3 04:38:52.353: RT: SET_LAST_RDB for 0.0.0.0/0
OLD rdb: via 10.129.124.33, Vlan2
NEW rdb: via 10.129.124.1, Vlan1
=== PING 2 ECHO REQUEST ===
*Mar 3 04:38:52.353: IP: tableid=0, s=192.168.60.4 (FastEthernet4), d=100.1.1.1 (Vlan2), routed via RIB
*Mar 3 04:38:52.353: NAT: s=192.168.60.4->10.129.124.2, d=100.1.1.1 [14159]
*Mar 3 04:38:52.353: IP: s=10.129.124.2 (FastEthernet4), d=100.1.1.1 (Vlan2), g=10.129.124.33, len 60, forward
*Mar 3 04:38:52.353: ICMP type=8, code=0
=== PING 2 ECHO REPLY ===
*Mar 3 04:38:53.029: NAT*: s=100.1.1.1, d=10.129.124.2->192.168.60.4 [19825]
*Mar 3 04:38:53.029: IP: tableid=0, s=100.1.1.1 (Vlan1), d=192.168.60.4 (FastEthernet4), routed via RIB
*Mar 3 04:38:53.033: IP: s=100.1.1.1 (Vlan1), d=192.168.60.4 (FastEthernet4), g=192.168.60.4, len 60, forward
*Mar 3 04:38:53.033: ICMP type=0, code=0
In the section "Ping 2 Echo Request" line 2 shows the NAT translating the packet to the address for the first provider but line 3 shows it routing it through the second one.
In this case, the ICMP packet goes through but it is problematic if the ISP restricts the service by source-address (like RPF) or there is some acceleration mechanism inside the provider cloud, other than just plain routing.
What am I missing? Here is the relevant part of the configuration. I deliberately disabled CEF to be able to debug the messages, but I *think* this may be altering the actual router behavior. This router does not have a "debug ip cef packet" command.
no ip cef
ip dhcp pool lan-side
import all
network 192.168.60.0 255.255.255.0
default-router 192.168.60.1
domain-name doublewan.local
dns-server 8.8.8.8 8.8.4.4
lease infinite
ip domain name doublewan
interface FastEthernet0
!doesn't appear on running-config: vlan 1 is the default access vlan
!switchport access vlan 1
interface FastEthernet1
switchport access vlan 2
interface FastEthernet2
shutdown
interface FastEthernet3
shutdown
interface FastEthernet4
ip address 192.168.60.1 255.255.255.0
ip nat inside
ip virtual-reassembly
no ip route-cache
duplex auto
speed auto
interface Vlan1
ip address 10.129.124.2 255.255.255.224
ip nat outside
ip virtual-reassembly
no ip route-cache
interface Vlan2
ip address 10.129.124.35 255.255.255.224
ip nat outside
ip virtual-reassembly
no ip route-cache
ip route 0.0.0.0 0.0.0.0 Vlan1 10.129.124.1
ip route 0.0.0.0 0.0.0.0 Vlan2 10.129.124.33
ip nat inside source route-map nat1 interface Vlan1 overload
ip nat inside source route-map nat2 interface Vlan2 overload
ip access-list standard acl4-nexthop-vlan1
permit 10.129.124.1
ip access-list standard acl4-nexthop-vlan2
permit 10.129.124.33
route-map nat2 permit 10
match ip address 102
match ip next-hop acl4-nexthop-vlan2
match interface Vlan2
route-map nat1 permit 10
match ip address 101
match ip next-hop acl4-nexthop-vlan1
match interface Vlan1
control-plane
Of course, there is some configuration pending for redundancy and stuff.
Thanks a lot in advance.
[1] http://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/100658-ios-nat-load-balancing-2isp.html

Hello.
This might be a bug in debug command or the IOS (without ip cef) you use; as routing is done before NAT (inside to outside).
To make sure it works fine with ip cef, just enable strict uRPF (or just ACL) on .1 and .33 interfaces and see if you see any packet sent over wrong interface.
PS: please check "sh ip cef 100.1.1.1"; I guess ip cef would tell you "per-destination sharing".

Load Balancing 2 routers

Hi all
Can someone tell me the best way to load balance between 2 routers, can someone post a typical config ?
thanks a million
Carl

Hi Carl,
You can use the following load-blancing methods between the routers.
1. Static routes or default route load-balancing
2. Multilink PPP
3. Equal/unequal cost path load-balancing with Dynamic Routing protocol.
4. CEF load-balancing.
Please see the DOC below.
http://www.cisco.com/en/US/products/hw/modules/ps2033/products_white_paper09186a0080091d4b.shtml
I have multilink PPP and static route load-balancing config handy with me. Please see below :
interface Multilink1
ip address 193.193.193.1 255.255.255.252
ppp multilink
multilink-group 1
interface Serial0/2
no ip address
encapsulation ppp
ppp multilink
multilink-group 1
interface Serial0/3
no ip address
encapsulation ppp
ppp multilink
multilink-group 1
interface Serial1/1:0
ip address 192.168.170.1 255.255.255.0
encapsulation ppp
no ip route-cache
interface Serial1/2:0
ip address 192.168.180.1 255.255.255.0
encapsulation ppp
no ip route-cache
ip route 172.28.20.0 255.255.255.0 192.168.170.2
ip route 172.28.20.0 255.255.255.0 192.168.180.2
HTH,
-amit singh

Load-balancing issues with iPlanet and multiple clusters

We're in performance test of a large-scale clustered deployment based on WLS 5.1sp10.
Due to scalability/functionality issues, some of which we've seen firsthand and
some of which we've been informed of by associates as well as BEA representatives,
we've chosen to implement multiple clusters with a maximum of three nodes each.
These clusters will be fronted by a web server tier consisting of iPlanet servers
using the proxy plugin.
Due to hardware constraints (both in test and in production), however, we've configured
the iPlanet servers to route across the multiple clusters. In our test environment,
for instance, we've got a single iPlanet server routing across two 3-node clusters,
and the configuration in obj.conf is as follows:
<Object name="application" ppath="*/application">
Service fn="wl-proxy" \
WebLogicCluster="clusterA_1:9990,clusterB_1:9991,clusterA_2:9990,clusterB_2:9991,clusterA_3:9990,
clusterB_3:9991" \
CookieName="ApplicationSession"
</Object>
Our issue is that the load-balancing doesn't appear to work across the clusters.
We're seeing one cluster get about 90% of the load, while the other receives
only 10%.
So, the question (finally!) is: Is this configuration correct (i.e., will it
work according to the logic of the proxy plugin), and is it appropriate for this
situation? Are there other alternative approaches that anyone can recommend?
Thanks in advance,
cramer

I use weblogic6.1 with sp2+windows 2000.I develop a web application and deploy
it to cluster.Through HttpClusterServlets proxy of weblogic I found that a server
in cluster almost get 95% of requests but another only get 5% of requests.Why???
I don't set any special parameter.And the weight of the two clustered server is
equal.I use round-robin arithmetic.
Thanks!
"cramer" <[email protected]> wrote:
>
We're in performance test of a large-scale clustered deployment based
on WLS 5.1sp10.
Due to scalability/functionality issues, some of which we've seen firsthand
and
some of which we've been informed of by associates as well as BEA representatives,
we've chosen to implement multiple clusters with a maximum of three nodes
each.
These clusters will be fronted by a web server tier consisting of iPlanet
servers
using the proxy plugin.
Due to hardware constraints (both in test and in production), however,
we've configured
the iPlanet servers to route across the multiple clusters. In our test
environment,
for instance, we've got a single iPlanet server routing across two 3-node
clusters,
and the configuration in obj.conf is as follows:
<Object name="application" ppath="*/application">
Service fn="wl-proxy" \
WebLogicCluster="clusterA_1:9990,clusterB_1:9991,clusterA_2:9990,clusterB_2:9991,clusterA_3:9990,
clusterB_3:9991" \
CookieName="ApplicationSession"
</Object>
Our issue is that the load-balancing doesn't appear to work across the
clusters.
We're seeing one cluster get about 90% of the load, while the other
receives
only 10%.
So, the question (finally!) is: Is this configuration correct (i.e.,
will it
work according to the logic of the proxy plugin), and is it appropriate
for this
situation? Are there other alternative approaches that anyone can recommend?
Thanks in advance,
cramer

What is load balancer in fms cluster and how to configure it and testing fms clustering

Hey guys,
I am new to fms and clustering the fms server in origin-edge mode.But i am confused actually what is load balancer and how to configure it .
After configuring , how to test and confirm that fms clustering is working.Is there any one can help me, plz....................
thanks in Advance........

Flash Media Server does not come bundled with a load balancer. In theory, one deploys FMS in an edge/origin configuration like this
1 Origin ----> N Edges ------> Customer Traffic
The idea here is that N edges shoulder the load for most customers with a single origin coordinating resources like VOD content or script access. The issue that remains is "how do I spread customers over the N edges" and that's where load balancing comes in. Most customers use a prepackaged load balancing solution - as an Adobe staffer I can't recommend any of them over the other, but you should be able to get some recommendations here along with just googling for it. The short answer contained here though is, you're going to have to find one outside of FMS if that's needed for your setup.
Asa

Network Load balancing for Server 2003 and Server 2012

Our environment currently has 2 web servers running Windows Server 2003 with Network Load Balancing. We are looking to update the servers to Windows Server 2012. Is it possible to add Windows Server 2012 into the Windows Server 2003 Network Load
balancing cluster? This way we could bring up 2 new servers add them into the network load balancing and then take out the 2003 servers without disrupting our production.
Any thoughts or suggestions on how to make this work properly?

Hi,
You can upgrade an existing Network Load Balancing (NLB) cluster to Windows Server 2008, Windows Server 2008 R2, or Windows Server 2012 by taking the entire cluster offline
and upgrading all the hosts, or you can leave the NLB cluster online and perform a rolling upgrade. A rolling upgrade entails taking individual cluster hosts offline one at a time, upgrading each host, and returning the host to the cluster. You continue upgrading
individual cluster hosts until the entire cluster is upgraded. A rolling upgrade allows the cluster to continue running during the upgrade.
The related KB:
Upgrading an Existing Network Load Balancing Cluster
http://technet.microsoft.com/en-us/library/cc731691(v=ws.10).aspx
Hope this helps.
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Load Balancing with ASR9000 vN and multiple ISPs

Hi,
we will deploy a new DC as Active/Active.
We will have ISPA and ISP B in each DC. Internet users are anybody in the internet coming to our e-commerce DC application.
How could we do load balancing between ISPs using the ASR9001 and nV feature ?
There is any IOS-XR feature that could help us about to do load balancing between ISPs?
Thanks a lot.
Regards,
J

You have 2 options here Jordi, either you can use BGP loadbalancing, this requires multipath as BGP by default would only install one route from the BGP table to the RIB hence FIB.
But this may result in excessive IRL (inter rack link) usage in the cluster when traffic coming in on rack0 wants to take the bGP path out on rack1
You could also use ABF (access-list based forwarding) to forcelly push traffic received on rack0 out on the link on rack0 and use an ipsla tracker to fallback to rack1 in case the uplink is gone.
Alternatively to extend this by IGP signaling to redirect traffic preferably to rack1 to start with to minimize the IRL usage.
And then you also have the ability to use RPL in the uplink path to make one link more preferred on teh internet then the other in case you want to control a bit which link is preferably used on rack0 or rack1
regards
xander

Load balancing between application server and database

Hi,
is there any load balancing between the application server and the database? Consider we have a single instance of an application server that sends database queries from different clients to the database. Are the requests queued in some way at the application server, allowing to control the flow of the queries (e.g. queries from "more important" clients might be sent with a higher priority)?
Thanks for your help!

Hi Victor/Jim/Volker,
Thanks a lot for all the responses..
Just wanted to let you guys know that my installation finished successfully.
The thing which confused me was that my Qtime, Qdate and everything else was showing correct values..
Well, my problem I set the environmental variable PASE_TZ to the EST time zone on a SYS level using WRKENVVAR>F4>SYS and added the variable. I logged off and the sidofr logged off, but one user which should have logged off and didn't was the "SAPINST"(my installation user) which was logged in the subsystem TMKSVR00.
Even when I had closed the SAPINST installlation program, the user doesn't log off...it just sits there until and unless u shut him out of the system using the option 4 on wrkactjob for ending the JOB(SAPINST logged in the system below the TMKSVR00 subsystem)
So since the SAPISNT user never logged of, his environmental variables were not initilized properly, even after the changes...
This thought came to me almost after a 6 hours of wasting my time searching for notes here and there...
I think when u end/stop the install in SAPINST, the SAPINST user should log off the AS400 system, but I have noticed, it never does...although when u restart the installation, if u have noticed it shows you the log on for the SAPINST user in the TMKSVR screen...
Its kind of buggy, I would say...
I have noticed, that even when I log on to AS400 from home or from a remote PC using Emulator, it shows me logged in the subsystem and even after i have logged of, it still shows me there...
Anyway, thanks a lot guys...for all your responses..
Just wanted to let you know all.
Thanks
Abhi

Load balancing SMA web service and SMA end point URL

Hi,
We have set up the recommended 3 servers with Azure Pack, SMA Web Service and Runbook Worker. We are now wanting to configure the Azure pack portal to setup the SMA endpoint url for the web service. Before we do that, we are assuming we should
load balance the web services to answer on 1 url (ie, smaws.domainname.com).
1. Is there any guidance or things to consider when load balancing the 3 web services to answer to 1 url. We will probably use f5 since that is what we use.
2. The end point url that we configure for Azure Pack automation should be this load balanced URL correct?
3. Should we have the Azure pack installed on just one of the servers or all 3. We did all 3 but it seems like server2 and 3 just redirect to 1 anyway so I am assuming the URL for Azure pack is stored in a db somewhere.
4. Are there any other components of SMA/Azure Pack that should also be load balanced?
Thanks
Thanks Lance

So in this case you need to register the SMA Runbook Workers (do this on machine 1):
$webService
= "https://localhost"
$workers
= (Get-SmaRunbookWorkerDeployment
-WebServiceEndpoint
$webService).ComputerName
if($workers
-isnot [system.array]) {$workers
= @($workers)}
$workers
+= "MachineName2"
$workers += "MachineName3"
New-SmaRunbookWorkerDeployment
-WebServiceEndpoint
$webService -ComputerName
$workers

ESXi 4.1 NIC Teaming's Load-Balancing Algorithm,Nexus 7000 and UCS

Hi, Cisco Gurus:
Please help me in answering the following questions (UCSM 1.4(xx), 2 UCS 6140XP, 2 Nexus 7000, M81KR in B200-M2, No Nexus 1000V, using VMware Distributed Switch:
Q1. For me to configure vPC on a pair of Nexus 7000, do I have to connect Ethernet Uplink from each Cisco Fabric Interconnect to the 2 Nexus 7000 in a bow-tie fashion? If I connect, say 2 10G ports from Fabric Interconnect 1 to 1 Nexus 7000 and similar connection from FInterconnect 2 to the other Nexus 7000, in this case can I still configure vPC or is it a validated design? If it is, what is the pro and con versus having 2 connections from each FInterconnect to 2 separate Nexus 7000?
Q2. If vPC is to be configured in Nexus 7000, is it COMPULSORY to configure Port Channel for the 2 Fabric Interconnects using UCSM? I believe it is not. But what is the pro and con of HAVING NO Port Channel within UCS versus HAVING Port Channel when vPC is concerned?
Q3. if vPC is to be configured in Nexus 7000, I understand there is a limitation on confining to ONLY 1 vSphere NIC Teaming's Load-Balancing Algorithm i.e. Route Based on IP Hash. Is it correct?
Again, what is the pro and con here with regard to application behaviours when Layer 2 or 3 is concerned? Or what is the BEST PRACTICES?
I would really appreciate if someone can help me clear these lingering doubts of mine.
God Bless.
SiM

Sim,
Here are my thoughts without a 1000v in place,
Q1. For me to configure vPC on a pair of Nexus 7000, do I have to connect Ethernet Uplink from each Cisco Fabric Interconnect to the 2 Nexus 7000 in a bow-tie fashion? If I connect, say 2 10G ports from Fabric Interconnect 1 to 1 Nexus 7000 and similar connection from FInterconnect 2 to the other Nexus 7000, in this case can I still configure vPC or is it a validated design? If it is, what is the pro and con versus having 2 connections from each FInterconnect to 2 separate Nexus 7000? //Yes, for vPC to UCS the best practice is to bowtie uplink to (2) 7K or 5Ks.
Q2. If vPC is to be configured in Nexus 7000, is it COMPULSORY to configure Port Channel for the 2 Fabric Interconnects using UCSM? I believe it is not. But what is the pro and con of HAVING NO Port Channel within UCS versus HAVING Port Channel when vPC is concerned? //The port channel will be configured on both the UCSM and the 7K. The pro of a port channel would be both bandwidth and redundancy. vPC would be prefered.
Q3. if vPC is to be configured in Nexus 7000, I understand there is a limitation on confining to ONLY 1 vSphere NIC Teaming's Load-Balancing Algorithm i.e. Route Based on IP Hash. Is it correct? //Without the 1000v, I always tend to leave to dvSwitch load balence behavior at the default of "route by portID".
Again, what is the pro and con here with regard to application behaviours when Layer 2 or 3 is concerned? Or what is the BEST PRACTICES? UCS can perform L2 but Northbound should be performing L3.
Cheers,
David Jarzynka

Load balance on routers LAN and WAN

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