ANSNet Update
IETF
March, 1994
Jordan Becker
Advanced Network & Services
becker@ans.net
ANSnet Network Status Report -- March 30, 1994
ANSnet Phase-5 Network Upgrade Summary
Gated CIDR/BGP4 Deployment
Other Router Software Activities
End-to-End TCP Performance Experiments
Phase-5 T3 Network Upgrade Summary
Upgraded DS3/HSSI router adapters
- Full 44.736 Mb/s bandwidth
- 20KPPS full duplex switching speeds
Replaced T3 DSUs
- T3Plus MBX45 bandwidth managers at CNSS locations
- Larscom access T45 DSUs on ENSS-CNSS links
FDDI rings deployed at each CNSS location
Phase-5 T3 Map
Figure
(GIF - 47036 bytes)
Phase-5 T3 Network Upgrade Summary
Other deployment statistics:
- Six week deployment (ended December 18th)
- 17 backbone links, 21 ENSS links upgraded
- 35 cities visited
- 60 people involved in deployment
- Included two new T3 ENSS sites (Sandia and Phillips Lab)
Parts installed
- 110 new RS960 HSSI adapters
- 87 new RS960 FDDI adapters
- 14 T3Plus MBX45 bandwidth managers
- 55 Larsecom T45 DSUs
- Several miles of cables replaced (HSSI, FDDI, RS232, coax)
Parts removed
- 183 old RS960 HSSI adapters
- 35 old RS960 FDDI adapters
- 83 old Larse DSUs
Growth in Network Usage
Graph
(GIF - 32818 bytes)
Link Utilization: cnss24 --> cnss40
Graph
(GIF - 13107 bytes)
Link Utilization Forecast: cnss24 --> cnss40
Graph
(GIF - 11689 bytes)
Packet Proc. Rate: cnss24 --> cnss40
Graph
(GIF - 15658 bytes)
Packet Proc. Rate Forecast: cnss24 --> cnss40
Graph
(GIF - 10808 bytes)
ANS Gated/CIDR Deployment
Gated/CIDR software deployment on AS690, AS1133
- IBGP4, E-BGP4/3/2, EGP2, SLSP
- MIBs for SLSP, BGP
- Improved performance over Rcp_routed
- New policy search based on Radix Trie
- Temporarily used default AS690 --> AS01133
Prepared to eliminate fake AS numbers
Open Gated Problems
- AIX Kernel Radix Trie problem
- 3+ overlapping routes with different masks
- abc.def/8
- abc.def.0/10
- abc.def.0/12
- Fixed in AIX build coming within two weeks
- Same AS duplicated in AS-path re-announced to BGP3 peers
- Should be filtered from BGP3 announcements
- Okay for BGP4
ANS CIDR Deployment Status
Gated prepared to support proxy aggregation
ANSnet CIX peer prepared to accept/announce aggregates
48 aggregates currently configured for AS690
- 29 aggregates actually announced to AS690
- 1,974 class-based destinations represented
- 988 class-based destinations included
ANSnet/NSFnet Router Table Growth
Table
(GIF - 24771 bytes)
Internal Routing Stability (IBGP)
Graph
(GIF - 10273 bytes)
External Routing Stability (EBGP)
Graph
(GIF - 12712 bytes)
External Route Flap (EBGP+EGP)
Graph
(GIF - 23496 bytes)
ANS Router Software Activity
SLSP support for broadcast media
Implement IBGP server to reduce AS690 IBGP mesh (90+ --> 60+)
Gated policy code improvements
- Reduce gated memory consumption and config. file complexity
- Coloring of classful routes
- For ANSnet gateway selection
ANS Router Software Activity
IBM router system software enhancements
- Reduced system memory utilization
- OSI support
- CLNP forwarding, ES-IS support
- Priority queuing
- New RS960 buffering and queuing microcode
- Increased packets buffers
- Dynamic allocation of buffers
- Design for improved end-to-end TCP performance
Packets/sec and Bandwidth (Mbit/sec) vs. Window Size in Packets
Lost Packets vs. Window Size in Packets
Percent Packet Loss vs. Window Size in Packets
Graphs
(GIF - 15019 bytes)
TCP Transfer Speed (MB/s) vs. Window Size (KB) for 8 MB and
80 MB Transfers
As measured by ttcp between MHPCC and SDSC FDDI rings
Graph
(GIF - 10775 bytes)