One physical site with 2 subnets
Hi there,
Running server 2008 ent R2 domain with 2 DC server 2008 and one DC server 2012 ent datacenter all clients windows 8.1 x64. On my physical site I was running 2 subnets 10.10.10.0/24 and 10.10.2.0/24. Things were working fine. Till yesterday any computer attaining IP from subnet 10.10.2.0/24 is really really slow logging in, and the same computer would act accessing the network resources. I also tried to rejoined to domain the computer which already had 10.10.2.0/24 IP, it says the domain does not exist.
Steps:
-I manually put the IP from subnet 10.10.10.0/24 and restarted the machine things were very well, no lagging while logging on, can access the network resources etc.
-I disabled the scope for 10.10.2.0/24 under superscope of DHCP server and re-added just to make sure the problem goes away, the problem persist while any computer gets the IP from this subnet.
I had no issues before. This problem appeared recently. Could it be the new DC server 2012 doing something odd?
Need help with this odd problem.
Running server 2008 ent R2 domain with 2 DC server 2008 and one DC server 2012 ent datacenter all clients windows 8.1 x64. On my physical site I was running 2 subnets 10.10.10.0/24 and 10.10.2.0/24. Things were working fine. Till yesterday any computer attaining IP from subnet 10.10.2.0/24 is really really slow logging in, and the same computer would act accessing the network resources. I also tried to rejoined to domain the computer which already had 10.10.2.0/24 IP, it says the domain does not exist.
Steps:
-I manually put the IP from subnet 10.10.10.0/24 and restarted the machine things were very well, no lagging while logging on, can access the network resources etc.
-I disabled the scope for 10.10.2.0/24 under superscope of DHCP server and re-added just to make sure the problem goes away, the problem persist while any computer gets the IP from this subnet.
I had no issues before. This problem appeared recently. Could it be the new DC server 2012 doing something odd?
Need help with this odd problem.
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DNS not looking up the DNS server properly. Maybe there is a fault in the records? Try capturing the packets from DNS and dhcp.
ASKER
Guys,
I corrected the sites and services with correct subnet it should be 10.10.2.0/23, I made a new scope under DHCP for 10.10.2.0/23. Things work now my clients in 10.10.2.0/23 cannot access files from my server in 10.10.10.0/24. Help me to configure routing on my switch please.
For now, I have put 2 IPs on my file server and DC to work so that my clients can access the files;
i.e 10.10.10.11 and 10.10.2.11. But I do not want my DC to be multihomed. Need help
I corrected the sites and services with correct subnet it should be 10.10.2.0/23, I made a new scope under DHCP for 10.10.2.0/23. Things work now my clients in 10.10.2.0/23 cannot access files from my server in 10.10.10.0/24. Help me to configure routing on my switch please.
For now, I have put 2 IPs on my file server and DC to work so that my clients can access the files;
i.e 10.10.10.11 and 10.10.2.11. But I do not want my DC to be multihomed. Need help
Can u show us a topology of your network? Maybe one of us can accurately tell you what route is needed at which device. I think a static default route is needed on the switch. Would be a good idea to show us your switch's routing table.
ASKER
Kinny,
Attached is the show run from my brocade, will showrun, vlan, and route from a client (windows8.1) On my brocade I did not find any show ip route.
brocade6450.txt
Attached is the show run from my brocade, will showrun, vlan, and route from a client (windows8.1) On my brocade I did not find any show ip route.
brocade6450.txt
ASKER
Topology:
Cisco2911 ............>>>brocade 6450.........>>>>clients (very simple)
router switch win8.1
Cisco2911 ............>>>brocade 6450.........>>>>clients (very simple)
router switch win8.1
In your IPV4 route on client. I can only see the 2.0 network with /23. Whereas your switch is in 10.0 network. I think your client needs a route to 10.0 network, /24, DGW to router interface. Next setup a IP route 0.0.0.0 0.0.0.0 {interface type & number to the router}. Right now I think link fault lies between your client and switch. Any other expert thinks so too?
ASKER
Here is the show ip route from my cisco 2911 router:
router_2911#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, + - replicated route
Gateway of last resort is xx.xx.xx.xxx to network 0.0.0.0
S* 0.0.0.0/0 [1/0] via xx.xx.xx.xxx
10.0.0.0/8 is variably subnetted, 6 subnets, 3 masks
C 10.10.2.0/23 is directly connected, GigabitEthernet0/0 <<<<.......if this is here why am I not able to see shared folders from 10.10.10.0/24?
L 10.10.3.254/32 is directly connected, GigabitEthernet0/0
C 10.10.10.0/24 is directly connected, GigabitEthernet0/0
L 10.10.10.254/32 is directly connected, GigabitEthernet0/0
C 10.10.11.0/24 is directly connected, GigabitEthernet0/1.801
L 10.10.11.254/32 is directly connected, GigabitEthernet0/1.801
xx.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 72.xx.xx.xxx/28 is directly connected, GigabitEthernet0/1.420
L 72.xx.xx.xxx/32 is directly connected, GigabitEthernet0/1.420
router_2911#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, + - replicated route
Gateway of last resort is xx.xx.xx.xxx to network 0.0.0.0
S* 0.0.0.0/0 [1/0] via xx.xx.xx.xxx
10.0.0.0/8 is variably subnetted, 6 subnets, 3 masks
C 10.10.2.0/23 is directly connected, GigabitEthernet0/0 <<<<.......if this is here why am I not able to see shared folders from 10.10.10.0/24?
L 10.10.3.254/32 is directly connected, GigabitEthernet0/0
C 10.10.10.0/24 is directly connected, GigabitEthernet0/0
L 10.10.10.254/32 is directly connected, GigabitEthernet0/0
C 10.10.11.0/24 is directly connected, GigabitEthernet0/1.801
L 10.10.11.254/32 is directly connected, GigabitEthernet0/1.801
xx.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 72.xx.xx.xxx/28 is directly connected, GigabitEthernet0/1.420
L 72.xx.xx.xxx/32 is directly connected, GigabitEthernet0/1.420
ASKER
Hi Kenny,
*************
In your IPV4 route on client. I can only see the 2.0 network with /23. Whereas your switch is in 10.0 network. I think your client needs a route to 10.0 network, /24, DGW to router interface. Next setup a IP route 0.0.0.0 0.0.0.0 {interface type & number to the router}. Right now I think link fault lies between your client and switch. Any other expert thinks so too? *
**************************
You are correct. At this time my client(wind 8) can only access a server under 10.10.10.0/24 unless I put an IP from 10.10.2.0/23 on that server. Some route etc needs to be put into brocade switch. Where and how I need help.
Thanks
*************
In your IPV4 route on client. I can only see the 2.0 network with /23. Whereas your switch is in 10.0 network. I think your client needs a route to 10.0 network, /24, DGW to router interface. Next setup a IP route 0.0.0.0 0.0.0.0 {interface type & number to the router}. Right now I think link fault lies between your client and switch. Any other expert thinks so too? *
**************************
You are correct. At this time my client(wind 8) can only access a server under 10.10.10.0/24 unless I put an IP from 10.10.2.0/23 on that server. Some route etc needs to be put into brocade switch. Where and how I need help.
Thanks
ASKER
Hi,
On the router what does this access 23 mean:
access-list 23 permit 10.10.10.0 0.0.0.7
On the router what does this access 23 mean:
access-list 23 permit 10.10.10.0 0.0.0.7
That standard access list number 23 applied permit to subnet 10.10.10.0/29 255.255.255.248
ASKER
Nadir,
Does this access list allows my 10.10.10.0/24 and 10.10.2.0/23 subnets? By looking at the 23 I am assuming my 10.10.2.0/23 is not allowed. Can I put:
-access list 23 permit 10.10.2.0/23 255.255.253.254 ? Need help
Thanks
Does this access list allows my 10.10.10.0/24 and 10.10.2.0/23 subnets? By looking at the 23 I am assuming my 10.10.2.0/23 is not allowed. Can I put:
-access list 23 permit 10.10.2.0/23 255.255.253.254 ? Need help
Thanks
ASKER
Hi,
I can ping all my servers in subnet 10.10.10.0/24 from client with 10.10.2.61/23 address but cannot access shared folders unless I assign two IP's to that server, one from each subnet.
I can ping all my servers in subnet 10.10.10.0/24 from client with 10.10.2.61/23 address but cannot access shared folders unless I assign two IP's to that server, one from each subnet.
ASKER
No changes in router were made.
Nadir,
Pingpath is fine even if the machine attains an IP from 10.10.2.0/24
Bominthu;
Yes I am able to ping the DNS and even the DHCP from the machine with IP 10.10.2.0/24
Guys its the really really slowness from this subnet. Amazingly if I assign static IP from 10.10.10.0/24 the machines boost up with no slowness.
I thought DHCP logs would tell me something, but the funny thing is the machine gets the IP from 10.10.2.0/24 but after a long delay. I had already removed any antivirus and firewalls from DHCP and the client to set aside the possible cause.
I am totally out of ideas. Need help