Redundant Connectivity With Per-Vlan Spanning Tree - HP Bc1500 - BladeSystem - Blade PC Supplementary Manual

This reference design illustrates how you can deploy the HP PC Blade Switch into a network without ini-
tially connecting the switch in a redundant fashion. This "staging" method allows you to quickly deploy
switches, giving you time to evaluate the solution. When you want redundancy, you can connect link e44
and e46 (see the next section for an example.) If either link A & C or D were to fail, link E would take
over.
Network Consideration
•
You can deploy the HP PC Blade Switch into this scenario without making changes to the default con-
figuration.
•
For Cisco networks, when running PVST/PVST+, links A, B, and C may use either 802.1q or
ISL.encapsulation.
•
Optionally, you can use IEEE 802.3ad Link Aggregation in various combinations to enhance perfor-
mance and link level redundancy.
•
If you want VLAN Load Balancing, you can use additional uplinks. See the next section for details.

Redundant connectivity with per-VLAN Spanning Tree

(VLAN 101)
(VLAN 102)
A
0/1
Cisco 2960G
0/2
Aggregation Switch 1
0/21 0/22
D
(VLAN 102 to 2)
F
(VLAN 101 to 1)
Physical Link Forwarding to Root
Logical Link Forwarding Designated
(Alternate) Blocking
Description
•
VLAN 1 assigned to all odd ports e1 - e39, e45 & e46.
•
VLAN 2 assigned to all even ports e2 - e40, e43 & e44.
This reference design illustrates how four uplinks can connect the HP PC Blade Switch to two separate
aggregation switches forming a fully redundant network. If either link A & C or D were to fail, link E
would take over. HP recommends starting with this example for Cisco networks using PVST/PVST+ where
you want switch-based redundancy. If either link A & C or D were to fail, link E and G would take over.
Cisco 6500
1/1 Core Switch 1/2
(VLAN 102)
Root for all VLANs
(VLAN 101)
C
0/2
(VLAN 102)
e43 e46
(VLAN 101 to 1)
HP PC Blade
Switch
e45 e44
(VLAN 102 to 2)
VLAN 1 Blade PC Image Management, PXE, DHCP,
VLAN 2 Remote Access Devices, HP SAM, HP SIM,
Network Storage, DHCP, DNS, Active Directory
(VLAN 101)
B
0/1
Cisco 2960G
Aggregation Switch 2
0/21 0/22
E
G
28