09-15-2008 05:47 AM
Is "ISL_R_READY" mode required for Extended Fabrics?
Doesn't look like it... Normally with local/campus ISL's we don't use it...
The LongDistance will be set to LD.
Is ISL_R_Ready required to be on??
09-23-2008 03:01 PM
A few things: this scenario applies to 2 sites in different cities sparated by 82Km. Multimode fiber is fine since we're connecting the Brocade to a Nortel device at each end.
Extended Fabrics license is required
make sure PID format is consistent (the same) across ALL switches in the fabric
make sure every switch has a different Domain ID
Even if you're using CWDM/DWDM device such as Nortel, the cards that connect to your equipment may be TDM cards (to split the laser signal). In this case the following is required:
hard-code all E-ports to the same speed (portcfgspeed 1/0, 1)
configure the port for R_RDY mode (portcfgislmode 1/0, 1)
disable trunking on the port (portcfgtrunkport 1/0, 0)
LD is dynamic setting of the buffers based on the distance but it better to use LS (static) if you know the distance. If the diatnce between the 2 sites is 82Km for instance chose 90 (portcfglongdistance 1/0 ls 0 90)
the config must be the same for the remote port
your portcfgshow 1/0 on port should look like this: (this example is from a 48K with Fbaric OS 6 or above)
Area Number: 0
Speed Level: 1G (portcfgspeed 1/0, 1) hard coding the WAN ports to 1Gbps
AL_PA Offset 13: OFF
Trunk Port OFF (portcfgtrunkport 1/0, 0) this configuration is not applicable to a port configured for ISL R_RDY mode
Long Distance LS (portcfglongdistance 1/0 LS 0 90) using LS for static distance configuration
VC Link Init OFF (portcfglongdistance 1/0 LS 0 90) for an ISL configured for R_RDY mode, this setting should be set to 0
Desired Distance 90 Km (portcfglongdistance 1/0 LS 0 90) the longest distance between NJ& NY is 82Km as provided by carrier. We're specifying 90Km
Reserved Buffers 51 (based on the distance specified, 51 buffers were statically allocated to this E-port)
Locked L_Port OFF
Locked G_Port OFF
Disabled E_Port OFF
ISL R_RDY Mode ON (portcfgislmode 1/0, 1) this flow control setting is optimal for TDM cards installed on the Nortel devices
RSCN Suppressed OFF
Persistent Disable OFF
NPIV capability ON
QOS E_Port ON
Mirror Port OFF