.Part 2 Fabric Infrastructure Rules HP SAN Design Reference Guide 785352-001

MP Router hop count
The MP Router counts the same as a Fibre Channel switch is counted with respect to fabric hop
count. See Figure 55 (page 119). Devices communicating across fabrics through an MP Router must
adhere to both the B-series 7-hop limit within an edge fabric and the MP Router 12-hop limit.
Figure 55 MP Router with seven hops
25119b
Fabric 1
Fabric 2
1
2
3
4
MPR 1
5
6
7
Figure 56 Front and translate domains
25120b
MPR 1
MPR 2
MPR 3
Fabric 2
Translate domain 1
Fabric 3
Translate domain 2
Fabric 1
translate domains
(1 to 31)
Each fabric can have up to 10
front domains.
Each fabric can access
up to 31 translate
(phantom) domains
(31 remote fabrics).
Interswitch link (ISL) E_Port
Front (phantom)
domain (EX_Ports)
MP Router backbone fabric
An MP Router backbone fabric consists of at least one MP Router and includes all MP Routers and
B-series Fibre Channel switches connected to the MP Router through E_Ports. The MP Router
backbone fabric is subject to all standard B-series Fibre Channel switch fabric rules. The MP Router
counts as one Fibre Channel switch in terms of the maximum number of switches in a B-series
fabric.
Fibre Channel switch fabric rules 119