DR Will Not Connect to the Network (4038907)

The DR is shipped with a default IP and subnet as an option for the network if where the system will reside does not have or does not support DHCP, then the DR Series system can use the default IP (10.77.88.99) and subnet mask (255.0.0.0) addresses provided for initialization.  It's expected during the initial setup to change the default IP if a static or DHCP is available or if a IP or DHCP is not available complete the Initialization using the defaults then change the IP in accordance to your network. 

To configure new networking settings (or to change from those set using the Initial System Configuration Wizard),

complete the following:

1. Select System Configuration → Networking.

The Networking page is displayed. Select settings for hostname, IP Address, DNS, Bonding, or to view the Ethernet

port settings (Eth0-Eth3) for the DR Series system.

• To configure hostname, skip to step 2.

• To configure IP addressing, skip to step 5.

• To configure DNS, skip to step 10.

2. To change the current Hostname, select the Hostname tab and click Edit Hostname on the options bar.

The Edit Hostname dialog is displayed.

3. Type a hostname in Hostname that meets the following supported character types and length:

• Alphabetic—allows A-Z, a-z, or a combination of upper and lower case alphabetic characters.

• Numeric—allows numerals zero (0) through 9.

• Special characters—allows only the dash (-) character.

• Length limit—hostnames cannot exceed the maximum length of 19 characters.

4. Click Submit to set the new hostname for your system.

5. To change the current IP address settings for the selected NIC bond or Ethernet port, select the Interfaces tab and

click Edit Interfaces on the options bar.

The Edit Interface — <bond or Ethernet port number> dialog is displayed.

6. Under IP Address, in Mode, select Static (to set static IP addressing for your system), or select DHCP (to set

dynamic IP addressing for your system).

NOTE: To select the DHCP mode of IP addressing, select DHCP, and click Submit. The remaining substeps in

this step only need to be completed if you selected the Static mode of IP addressing for the DR Series

system.

a. In New IP Address, type an IP address that represents the new IP address for your system.

b. In Netmask, type an netmask address value that represents your system (the system IP address and netmask

identify the network to which your system belongs).

c. In Gateway, type an IP address for the gateway associated with your system.

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7. Under MTU, in MTU, enter the value you want to set as the maximum.

NOTE: Ensure that the value that you enter in MTU is the same for the clients, Ethernet Switch, and the

appliance. The connection between the clients, the Ethernet switches, and the appliance will break if the

MTU number is not the same on all the components.

NOTE: In computer networking, jumbo frames are Ethernet frames with more than 1500 bytes of payload (but

in some cases, jumbo frames can carry up to 9000 bytes of payload). Many Gigabit Ethernet switches and

Gigabit Ethernet network interface cards support jumbo frames. Some Fast Ethernet switches and Fast

Ethernet network interface cards also support jumbo frames.

Some computer manufacturers use 9000 bytes as the conventional limit for jumbo frame sizes. To support jumbo

frames used in an Internet Protocol subnetwork, both the host DR Series system (initiator or source) and the target

DR Series system have to be configured for 9000 MTU.

Consequently, interfaces using a standard frame size and those using the jumbo frame size should not be in the

same subnet. To reduce the chance of interoperability issues, network interface cards capable of supporting jumbo

frames require specific configurations to use jumbo frames.

To verify that the destination system can support a specific frame size, use the DR Series system CLI command

network --ping --destination <IP address> --size <number of bytes>.

For more information, contact Dell Support for assistance (for details, see Contacting Dell).

NOTE: Make sure that if you are using any Dell network switches that you take full advantage of the latest

switch firmware upgrades and application notes. The application notes provide procedures that assist you in

performing switch firmware upgrades and saving configuration files (for complete details, see

support.dell.com/ and navigate to Drivers and Downloads for your system type).

NOTE: When setting or changing the MTU value, make sure that you verify that the Ethernet network switch

is capable of supporting an MTU size that is equal to or larger than the value you are setting. Any mismatch in

MTU values between the clients, Ethernet network switch, and the DR Series system appliance will make it

inoperable.

Dell suggests that you observe standard best practices when deploying jumbo frames in networks, and

recommends using jumbo frames with the DR Series system because this frame size typically provides the best

performance. However, for networks that do not support jumbo frames, the DR Series system also supports using

the standard frame size.

8. Under Bonding, from the Bonding configuration list, select the appropriate bonding configuration.

NOTE: You may lose the connection to the system if you change the bonding configuration. Change the

bonding configuration only if the system accepts the new bonding type.

     • ALB—Configures adaptive load balancing (ALB), which is the default setting.

NOTE: ALB load balancing does not balance the load properly when your backup servers are on a remote

subnet. This is because ALB uses the address resolution protocol (ARP) and ARP updates are subnetspecific.

Because this is the case, ARP broadcasts and updates are not sent across the router. Instead,

all traffic is sent to the first interface in the bond. To resolve this ARP-specific issue, make sure that your

data source systems reside on the same subnet as the DR Series system.

     • 802.3ad—Configures dynamic link aggregation using the IEEE 802.ad standard.

CAUTION: If you change the existing bonding setting, the connection to the DR Series system may be lost

unless you are sure that the system can accept this bonding type.

9. Click Submit to have the DR Series system accept the new values (or click Cancel to display the Networking page).

The Updated IP Address dialog is displayed when the selection is successful (if you change the static IP address

manually, you need to use this IP address in the browser when you log back into the DR Series system).

10. To configure DNS settings for your system, select the DNS tab and click Edit DNS on the options bar.

The Edit DNS dialog is displayed.

11. In Domain Suffix, type a domain suffix to use.

For example, acme.local. This is a required field.

12. In Primary DNS, type an IP address that represents the primary DNS server for your system; this is a required field.

13. For Secondary DNS, type an IP address that represents the secondary DNS server for your system; this is an

optional field.

14. Click Submit to have the DR Series system accept the new values (or click Cancel to display the Networking page).

The Updated DNS dialog is displayed when the selection is successful.

See the latest Series Admin Guide for further guidance.