Posted on 2005-01-21 10:59:36, modified on 2006-01-09 16:29:22
Tags: Networking
We have a ExtremeWare Summit/400 gigabit ethernet switch/router and a RiverStone RS/3000 fast ethernet switch/router. When using a single ethernet cable between the two, we often peaked at 80-90% utilisation and therefor added more ethernet cables and trunked them into one big virtual ethernet cable.
The configuration statements
Configuration on the RiverStone RS/3000:
smarttrunk add ports et.1.3 to st.1 smarttrunk add ports et.1.4 to st.1 smarttrunk add ports et.1.11 to st.1 smarttrunk add ports et.1.12 to st.1 smarttrunk create st.1 protocol no-protocol ! vlan add ports st.1 to rss-summit vlan create rss-summit port-based id 17 !
And on the ExtremeWare Summit/400
configure sharing address-based ip-source-dest create vlan "summit-rss" configure vlan "summit-rss" ipaddress 10.192.98.2 255.255.255.0 configure vlan "summit-rss" add port 5 untagged enable sharing 5 grouping 5,6,7,8
The commands to check if the status of the trunks
For the RS/3000:
barnet-core-sjh# port show port-status st.1
Flags: M - Mirroring enabled B - MLP Bundle S - SmartTRUNK port P - Configured as 802.1p
Negot- IFG Link Admin
Port Port Type Duplex Speed iation Value State State Flags
---- --------- ------ ----- ------ ----- ----- ----- -----
st.1 SmartTRUNK n/a n/a n/a Up
et.1.3 10/100-Mbit Ethernet Full 100 Mbits Auto Up Up
et.1.4 10/100-Mbit Ethernet Full 100 Mbits Auto Up Up
et.1.11 10/100-Mbit Ethernet Full 100 Mbits Auto Up Up
et.1.12 10/100-Mbit Ethernet Full 100 Mbits Auto Up Up
And for the Summit400
Summit400-48t:27 # show ports configuration
Port Configuration Monitor Fri Jan 21 00:14:31 2005
Port Port Link Auto Speed Duplex Flow Ld Share Media
State Status Neg Cfg Actual Cfg Actual Ctrl Master Pri Red
================================================================================
trunk-rss-1 ENABLED A ON AUTO 100 AUTO FULL NONE 5 UTP
trunk-rss-2 ENABLED A ON AUTO 100 AUTO FULL NONE 5 UTP
trunk-rss-3 ENABLED A ON AUTO 100 AUTO FULL NONE 5 UTP
trunk-rss-4 ENABLED A ON AUTO 100 AUTO FULL NONE 5 UTP
To see the utilisation
On the RS/3000
barnet-core-sjh# smarttrunk show distribution st.1 SmartTRUNK Member % Link Utilization Link Status Grp Status ---------- ----------- ----------------- ----------- ---------- st.1 et.1.3 30.40 Forwarding Up st.1 et.1.4 33.03 Forwarding Up st.1 et.1.11 29.55 Forwarding Up st.1 et.1.12 25.30 Forwarding Up
On the Summit/400
Summit400-48t:29 # show ports stats
Port Statistics Fri Jan 21 00:21:46 2005
Port Link Tx Pkt Tx Byte Rx Pkt Rx Byte Rx Rx
Status Count Count Count Count Bcast Mcast
================================================================================
trunk-rss-1 A 3863921 319130686 260162 32668772 0 0
trunk-rss-2 A 1240651 120939628 323512 41293811 0 0
trunk-rss-3 A 902577 102275906 413173 49910620 0 0
trunk-rss-4 A 1323322 156944892 549445 65218016 1 45830
Differences in physical cable selections
Both the RS/3000 and Summit/400 have different algorithms for choosing the physical cable the ethernet packet goes over:
The RS/3000 selects on stream: That is the combination of IP address of source and destination and the TCP/UDP port (if it are TCP or UDP packets). If the data is coming from the RS/3000, having multiple streams of data flowing between the computers would fully utilise the trunked ports.
The Summit/400 selects on source and destination IP address. If the data is coming from the Summit/400, having multiple streams of data flowing between the computers would utilise one cable between the Summit/400 and the RS/3000 .
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