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| The Reamer 2001-04-20, 6:46 pm |
| I know I saw a chart somewhere listing the costs for various links, I think it was related to OSPF. Anybody know where I might find this again?
Thanks,
Reamer | |
| dmaftei 2001-04-20, 6:56 pm |
| I don't know where you saw the chart, but in Cisco's OSPF the cost is, by default, 100000000/bandwidth.
HTH | |
| The Reamer 2001-04-20, 7:21 pm |
| Well, I knew the calculation, but I swear I saw someplace where they gave the formula along with a chart for the common defaults for links.
Reamer | |
| The Reamer 2001-04-20, 7:46 pm |
| I found another list. Not quite the one that I remember, but the material is the same. Got the following from Cisco's site:
In general, the path cost is calculated using the following formula:
10^8 ÷ Bandwidth
Using this formula, the default path costs were calculated as noted in the following list. If these values do not suit your network, you can use your own method of calculating path costs.
56-kbps serial link—Default cost is 1785
64-kbps serial link—Default cost is 1562
T1 (1.544-Mbps serial link)—Default cost is 65
E1 (2.048-Mbps serial link)—Default cost is 48
4-Mbps Token Ring—Default cost is 25
Ethernet—Default cost is 10
16-Mbps Token Ring—Default cost is 6
FDDI—Default cost is 1
Reamer | |
| ciscoguy2001 2001-04-20, 7:50 pm |
| quote:
Originally posted by The Reamer
Well, I knew the calculation, but I swear I saw someplace where they gave the formula along with a chart for the common defaults for links.
Reamer
you can find any chart on CCDA Prep. material or you must have seen that in ccda forum | |
| BlueBaron 2001-04-20, 11:32 pm |
| You can also find it in the ACRC text. Once my boss brings my book back in, I'll be able to give you the pg #. | |
| MadChef 2001-04-21, 5:38 am |
| quote:
Originally posted by The Reamer
I found another list. Not quite the one that I remember, but the material is the same. Got the following from Cisco's site:
In general, the path cost is calculated using the following formula:
10^8 ÷ Bandwidth
Didn't this change to accomodate GigE? Otherwise anything faster than 100Mbs has a fractional cost.
MadChef | |
| dmaftei 2001-04-21, 7:30 am |
| quote:
Originally posted by MadChef
Didn't this change to accomodate GigE? Otherwise anything faster than 100Mbs has a fractional cost.
You can change it yourself, with
auto-cost reference-bandwidth bw
bw "...in megabits per second (bandwidth). The range is 1 to 4294967; the default is 100." (this is a quote from www.cisco.com). | |
| Quintoh 2001-04-21, 7:39 am |
| are you thinking cost or Administrative Distance?
Quintoh | |
| The Reamer 2001-04-21, 2:01 pm |
| It's definately cost that I am thinking of. 
Reamer |
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