Cisco 3845 Hardware Installation Guide - Page 242
Switch Stack with Full Bandwidth Connections
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Stacking the Cisco EtherSwitch Service Modules Chapter 18 Connecting Cisco EtherSwitch Service Modules Figure 18-8 Switch Stack with Full Bandwidth Connections A= ACT A= FDX S= SPEED A= LINK A FE 0/1 FE 0/0 A F F S S L L PVDM2 PVDM1 PVDM0 AIM1 AIM0 NME-XD24ES1S-P 24x 23x 22x 21x 20x 19x 18x 17x 16x 15x 14x 13x 12x 11x 10x 9x 8x 7x 6x 5x 4x 3x 2x 1x CLASS 1 LASER PRODUCT LASERPRODUKT DER KLASSE 1 PRODUIT LASER DE CLASSE 1 PRODUCTO LASER CLASE 1 1 GE 1 24x 2x WHILE HULC STACK CABLES ARE ON THE FACEPLATE, ALL 6-32 THUMB SCREWS MUST BE SECURED MODE SYST MASTR STAT DUPLX SPEED STACK LINE PWR EN A B 121915 C Figure 18-9 shows a stack of Cisco EtherSwitch service modules and Catalyst 3750 switches with incomplete cabling connections. This stack provides only half bandwidth and does not have redundant connections. Figure 18-9 Switch Stack with Half Bandwidth Connections A= ACT A= FDX S= SPEED A= LINK A FE 0/1 FE 0/0 A F F S S L L PVDM2 PVDM1 PVDM0 AIM1 AIM0 NME-XD24ES1S-P 24x 23x 22x 21x 20x 19x 18x 17x 16x 15x 14x 13x 12x 11x 10x 9x 8x 7x 6x 5x 4x 3x 2x 1x CLASS 1 LASER PRODUCT LASERPRODUKT DER KLASSE 1 PRODUIT LASER DE CLASSE 1 PRODUCTO LASER CLASE 1 1 GE 1 24x 2x WHILE HULC STACK CABLES ARE ON THE FACEPLATE, ALL 6-32 THUMB SCREWS MUST BE SECURED STACK 2 MODE SYST MASTR STAT DUPLX SPEED STACK LINE PWR EN A 121918 B STACK 2 Figure 18-10 and Figure 18-11 show examples of stacks of Cisco EtherSwitch service modules and Catalyst 3750 switches with failover conditions. In Figure 18-10, the cable in link B is bad; therefore, this stack provides only half bandwidth and does not have redundant connections. In Figure 18-11, link B is bad, and the stack is partitioned into two separate stacks. The Cisco EtherSwitch service module 1 becomes the stack master of one stack and one of the Catalyst 3750 switches becomes the stack master of the second stack. 18-16 Cisco Network Modules Hardware Installation Guide OL-2485-20