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Chapter 4: Networks
interface as a trunk port. One ISP should be reachable from the protected physical
interface and one from the protected VLAN.
Protected Physical Egress VLAN: Enter the VLAN id for the secondary interface to
1.
share traffic
Configure ISP1 "Ping Address": Enter the IP to ping to determine if the primary
2.
(protected physical) route is alive. If the ping fails, then the BSC will switch to using
the VLAN interface.
Configure ISP2 "Ping Address": Enter the IP to ping to determine if the secondary
3.
(protected VLAN) route is alive. If the ping fails, then the BSC will switch to using the
protected interface.
Configure "Ping Interval": Time in minutes to monitor the link status. The BSC will
4.
check the link status of the protected physical and protected VLAN during each
interval.
Note: If you are using DHCP for the protected interfaces, you should configure both
Protected Physical and VLAN DNS Servers under the Managed Interface DHCP servers
Note: Mobility and Loadsharing are not supported with this feature.
Port settings
By default, the BSC's physical interfaces automatically negotiate bit rate and duplex type
for connections. However, if required, you can specify the following:
Interface speed and duplex type - Max indicates the highest speed supported by an
interface (for example, the BSC-2100 protected interface supports a speed of1000 Mbps
maximum).
Link
Select extra interfaces to bond to this interface, i.e. combine physical network links into a
Aggregation
single logical link. Link Aggregation has the following benefits:
•
Increased Bandwidth: Capacity is higher then an individual link alone.
•
Higher Availability: Failure of any single component link will not disrupt
communication; data flow is maintained and the failure is transparent to end-user.
Note: Before configuring, you need to remove the sticker that covers the link aggregation
ports. You should also set up the Admin port, which will make it easier to configure link
aggregation if link is lost (See "Configuring the Admin Interface" on page 4-24).
Specify a bonding mode, as determined by the make and model of your switch
1.
(applies globally to all interfaces, i.e. all VLANs and all managed interfaces):
•
•
•
4-4
IEEE 802.3ad Dynamic link aggregation. Creates aggregation groups that share
the same speed and duplex settings. Utilizes all interfaces in the active
aggregator according to the 802.3ad specification. The BSC transmit hash
policy is layer 3 + layer 4. The switch must support IEEE 802.3ad dynamic
trunking using LACP (802.3ad mode must be enabled on most switches).
Round-robin policy (for older switches): Transmit packets in sequential order from
the first available interface through the last. This mode provides load balancing
and fault tolerance. Requires fixed port trunking on the switch.
Adaptive load balancing: Outgoing traffic is distributed according to the current
load (computed relative to the speed) on each interface and receive load
balancing is achieved by ARP negotiation. Offers increased network bandwidth
by allowing transmission and reception over multiple ports to multiple destination
addresses, and also incorporates Adapter Fault Tolerance. Only the primary
receives incoming traffic. Only the primary transmits broadcasts/multicasts and
nonrouted protocols. The software load balances transmissions based on
Destination Address, and can be used with any switch.
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