Graphing Peering

Bill Nash billn at billn.net
Wed Jan 19 23:16:38 UTC 2005


Ah, completely different animal altogether, that. Thanks for the 
clarification. My initial read was multiple peers on separate interfaces, 
which isn't overly complex to track.

- billn

On Wed, 19 Jan 2005, Daniel Golding wrote:

>
>
>
> Andrew's issue is this - he's got an Ethernet port on a public peering
> switch with a bunch of peers. He can see the interface stats just fine but
> he's having trouble figuring out how much traffic is going to (or coming
> from) each peer. One interface, many peers, confusing problem. There isn't
> one VLAN per peer on most public peering switches - its one big Ethernet
> segment with each peer getting an IP out of a common subnet. Welcome to the
> world of broadcast multi-access peering.
>
> The classical way to do this is mac accounting. This can be pretty rough -
> its not really useful for anything more than a ratio, from what I've seen -
> the numbers tend to not add up properly.
>
> Another possibility (on Cisco) is using BGP Policy Accounting, although
> support can be spotty depending on hardware.
>
> For other platforms, there's some good information here:
> http://www.switch.ch/misc/leinen/snmp/monitoring/bucket-accounting.html
>
> The link on that page for Juniper's Destination Class Usage (DCU) is broken.
> Try this one instead:
> http://www.juniper.net/techpubs/software/junos/junos70/swconfig70-interfaces
> /html/interfaces-family-config25.html
>
> - Dan
>
>
> On 1/19/05 5:56 PM, "Bill Nash" <billn at billn.net> wrote:
>
>>
>>
>> If you're already using MRTG, hopefully you're at least passingly familiar
>> with perl and SNMP. If so, you can do some hackery to identify your BGP
>> peer interfaces automatically and then use it to reference existing
>> interface graphs.
>>
>> Take a peek in the BGP4 mib, specifically at the BgpPeerEntry subtree. You
>> may need to do some correlation inside the ifTable or maybe even ifX,
>> depending on platform and implementation, to correctly identify the
>> interface of your peer.
>>
>> - billn
>>
>>
>> On Wed, 19 Jan 2005, andrew matthews wrote:
>>
>>>
>>> no i mean graph bgp sessions...
>>>
>>> it's a single interface, and i want to graph every bgp session so i
>>> can see how much traffic i'm doing between each peer.
>>>
>>>
>>> On Wed, 19 Jan 2005 22:25:37 +0000 (GMT), Stephen J. Wilcox
>>> <steve at telecomplete.co.uk> wrote:
>>>> On Wed, 19 Jan 2005, andrew matthews wrote:
>>>>
>>>>> Anyone have any suggestions on graphing peering on a cisco router? I'm
>>>>> using mrtg and i did mac address accounting but the numbers are off.
>>>>
>>>> do you mean how to graph traffic to each host on a lan..?
>>>>
>>>> what platform do you have?
>>>>
>>>> Steve
>>>>
>>>>
>>>
>
>



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