| Title: | GIGAswitch |
| Notice: | GIGAswitch/FDDI Jan 97 BL3.1 914.0 documentation 412.1 ion 412.1 |
| Moderator: | NPSS::MDLYONS |
| Created: | Wed Jul 29 1992 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 995 |
| Total number of notes: | 4519 |
My customer trying to form the following configuration :
+-------------+ +------------+
| GIGAswitch |----------| GIGAswitch |
| |----------| |
| FGL-4 | | FGL-4 |
+-------------+ +------------+
| |
| |
+--------+ +--------+
| A | | B |
| Cisco | | Cisco |
| Router | | Router |
| B | | A |
+--------+ +--------+
| |
+------------------+
Is this configuration correct and workable?
If yes, how the FGL-4 port must be configured?
The customer try to config the FGL-4 ports as S ports. When he connect
the two routers too the GIGAswitch's the connection between the routers
change to unknown state.
As the customer told me he use the same configuration with Chipcom
concentrator instead of the Cisco routers and it's work fine.
He configure the FGL-4 ports as S ports. One of the S port is active while the
other stay in standby mode.
Regards,
Erez
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 978.1 | If your looking for availability... | LIE495::CITRON | Marty - NY PSC Network Consultant | Mon May 05 1997 04:02 | 14 |
While I do not know what your cisco routers are there for, I assume
that they support routed access to/from your Gigaswitch environment.
I am also assuming that the hunt group shown has default settings.
If this is true, and you are placing one router on each switch for
availability, I would simply dual home each router to both
gigaswitches.
The alternative of placing both routers and both GIGAswitches "narrows"
your capacity and would require a DAS card/switch. Dual Homing to fgl-4s
will require 4 ports, but you retain 2 full FDDIs worth of throughput
from the routers in the event of a switch failure.
Your existing topology seems to be in a pre-wrapped state
| |||||
| 978.2 | NNTPD::"erez@tavosf.iso.dec.com" | Mon May 05 1997 12:17 | 12 | ||
The customer use the GIGAswitches as his network backbone. He connect many routers and concentrators with dual homing to the 2 GIGAswitches. The reason for trying to form the following configuration, he don't have enough ports to dual home each router. How can we connect the two routers to the two GIGAswitches by using only one FGL-4 port on each GIGAswitch? and what you mean by saying "pre-wrapped state"? [Posted by WWW Notes gateway] | |||||
| 978.3 | NPSS::MDLYONS | Michael D. Lyons DTN 226-6943 | Mon May 05 1997 13:44 | 13 | |
Your diagram is unclear.
You can't dual home rings. If you have configured the
GIGAswitch/FDDI FGL-4 ports which are connected to the cisco devices as
M ports, then you are mixing a tree/ring topology and it won't work.
If they are configured as S ports, then you have a spanning tree
loop and one of the ports will be disabled.
Comparisons to a concentrator are not particularly useful. The
GIGAswitch/FDDI system is not a concentrator.
MDL
| |||||
| 978.4 | NPSS::MDLYONS | Michael D. Lyons DTN 226-6943 | Mon May 05 1997 13:46 | 16 | |
P.S. There is a great deal of existing discussion on redundant
topologies under the failover-configuration keyword:
Notes> show keyword failover-configurations/full
GIGAswitch
Created: 29-JUL-1992 12:28 978 topics Updated: 5-MAY-1997 09:44
-< GIGAswitch/FDDI Jan 97 BL3.1 914.0 documentation 412.1 >-
Keyword Note
>FAILOVER-CONFIGURATI 175.18, 175.19, 175.22, 175.23, 363.7, 510.10, 517.0,
517.1, 527.8, 527.9, 527.10, 540.0, 540.1, 540.2, 540.3,
540.4, 540.5, 540.6, 580.11, 743.8, 743.9, 743.10,
743.11, 743.12, 743.26, 868.7, 923.3
End of requested listing
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