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- ************************************************************************
- DDN MGT Bulletin 127 DISA DDN Defense Communications System
- 01 July 1993 Published by: DDN Network Info Center
- (NIC@NIC.DDN.MIL) (800) 365-3642
-
-
- DEFENSE DATA NETWORK
- MANAGEMENT BULLETIN
-
- The DDN MANAGEMENT BULLETIN is distributed online by the DDN Network
- Information Center under DISA contract as a means of communicating
- official policy, procedures and other information of concern to
- management personnel at DDN facilities. Back issues may be read
- through the TACNEWS server ("@n" command at the TAC) or may be
- obtained by FTP (or Kermit) from the NIC.DDN.MIL host [192.112.36.5]
- using login="anonymous" and password="guest". The pathname
- for bulletins is ddn-news/ddn-mgt-bulletin-nn.txt (where "nn" is the
- bulletin number).
- ************************************************************************
-
- SUBJECT: SOFTWARE REQUIRED FOR DOING BGP UPDATES WITH THE DDN MILNET
- T-20 CORE SERVERS. (CISCO & GatedD).
-
- GATEWAY ADMINISTRATORS: PLEASE NOTE
-
- THIS BULLETIN PROVIDES SOFTWARE VERSION REQUIREMENT INFORMATION FOR
- GATEWAYS THAT WISH TO DO BGP WITH THE T/20 ROUTER SERVERS!
- THIS BULLETIN ALSO UPDATES DDN MANAGEMENT BULLETIN 116 INFORMATION
- CONCERNING THE SOFTWARE REQUIRED FOR BGP.
-
-
-
- Required Software/Firmware Versions
- ===================================
-
- In order to establish BGP routing sessions with the MILNET
- Core Routing Servers, clients with cisco gateways or clients
- running GateD software must use the following software
- versions:
-
- GateD: 3.0Alpha or later
-
- Cisco: 9.0(4.1) or later for 9.0 users
- 9.1(3.1) or later for 9.1 users
- 9.17(2.1) or later for 9.17 users
-
- (The 9.17 release is restricted for use on the
- cisco 7000 platform)
-
-
- Please note that the cisco versions listed here do not match
- those previously listed in DDN MGT Bulletin 116 ("New Core
- Routing Servers and Need for Migration from EGP to BGP"). The
- versions shown here have been selected based on additional
- testing and operational information.
-
-
- ROUTER/GATEWAY ADMINISTRATORS FOR NON-CISCO OR NON-GateD ROUTERS
- SHOULD CONTACT THE APPROPRIATE VENDOR(S) TO DETERMINE THE
- REQUIRED SOFTWARE VERSION TO DO BGP.
-
-
-
- Effects of Using Old Software/Firmware Versions
- ===============================================
-
- For GateD users, older versions of software will not support
- the BGP-3 protocol.
-
- For cisco users, a problem will occur as the result of the net
- zero default advertisement as follows:
-
- Currently, the MILNET Core Routing Servers include a default
- gateway advertisement in routing updates sent to the client
- gateways. The default gateway is advertised as the next hop to
- both network 142.222.0.0 and network 0.0.0.0. Network
- 142.222.0.0 can be used by cisco users as a default-network,
- and network 0.0.0.0 is used by gateD users as the default
- network. Older versions of cisco firmware do not accept a
- network 0.0.0.0 advertisement in a BGP update and will handle
- it as an illegal network error. As a result, the cisco will
- terminate the routing session and then reinitiate it.
-
- The cycle of initiating and then closing the BGP session will
- continue repeatedly. The effect observed at the client gateway
- will be the BGP session starting and stopping repeatedly. This
- prevents the gateway from obtaining useful routing
- information.
-
- A client gateway with this problem also has an adverse effect
- on the Routing Server performance. Each time the BGP session
- is started, all of the MILNET routing information is sent to
- the client before the session is terminated. This represents a
- large amount of data and places a heavy load on the Routing
- Server and PSN interfaces. Because the client gateway
- repeatedly starts and stops the BGP session, a flood of
- information is continuously sent to the client. This will
- increase congestion, especially if there are a number of
- clients exhibiting this problem using the same Routing Server.
-
-
- Short-Term Workaround
- =====================
-
-
- TO PRESERVE THE INTEGRITY OF THE BGP SESSIONS FROM THE T-20's
- ROUTERS WITHOUT THE CORRECT VERSION OF BGP SOFTWARE NEED TO
- REFRAIN FROM DOING BGP SESSIONS WITH THE T-20's. REPEATED
- VIOLATIONS WILL BE REPORTED TO THE DDN MILNET MANAGER FOR
- DOD SPONSOR RESOLUTION.
-
-
- Until a client gateway can be upgraded to an acceptable
- software or firmware version, the client can establish an EGP
- routing session with the Routing Server.
-
- Please do not run a BGP session between a cisco with an old
- version of firmware and a T/20 Routing Server since it will
- cause increased congestion on the network and loading of the
- Routing Server.
-
- DISA point of contact is Mr McDaniel, (DDN MILNET, Manager) DSN 222-7580,
- Coml (703) 692-7580, email address: milnetmgr@ddn-conus.ddn.mil or DDN
- Network Analysts, DSN 222-5584, Coml (703) 692-5584.
-