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Core
~~~~
-- route validation
- fake multipath?
- config file: symbolic constants?
- counters (according to SNMP MIB?)
- generation of subnet mask ICMP's for v6?
-- debugging dumps and protocol tracing!
- unaligned accesses?
+- neighbor cache: local broadcast address?
+- ipv4: recognize site scope addresses?
+- ifdef out some debugging code?
+- better memory allocators
+- precedence of all packets (incl. TCP)
+- default preferences of protocols: prefer BGP over OSPF/RIP external routes?
+- all internal tables are in host order
+- filter: logging of dropped routes (?)
+- limitation of memory consumption: per-process and total (?)
+- alloca
+- adding of route: clear all bits not covered by masklen
+- switch: generate default route only if at least one BGP connection exists
-RIP
-~~~
-- RIP: export-only and import-only mode?
-- drop RIPv1 (Historic protocol)?
-
-OSPF
-~~~~
-
-Almquist & Kastenholz [Page 111]
-RFC 1716 Towards Requirements for IP Routers November 1994
+- route recalculation timing + flap dampening
+- reconfiguration without restart of all protocols?
+- change of interface address: ??? (down and up?)
+- "generate default route" switch for all IGP's
-7.2.2.2 Specific Issues
+- running protocol on an interface:
+ - interface is not required to exist
+ - can specify a wildcard pattern or an interface list
- Virtual Links
+- timers - one-shot and periodic, resolution 1 sec, randomized
+- re-configuration: restart of routing protocols (shutdown mode)
+- route: originating AS
- There is a minor error in the specification that can cause
- routing loops when all of the following conditions are
- simultaneously true:
+- Check incoming packets and log errors!!
- (1) A virtual link is configured through a transit area,
- (2) Two separate paths exist, each having the same
- endpoints, but one utilizing only non-virtual
- backbone links, and the other using links in the
- transit area, and
+RIP
+~~~
+ - RIP: export-only and import-only mode?
+ - drop RIPv1 (Historic protocol)?
+ - Route Tag
+ - limit routing table xfer (frequency, only to neighbors)
+ - multicast on/off
+ - remember routes for all neighbors?
- (3) The latter path is part of the (underlying physical
- representation of the) configured virtual link,
- routing loops may occur.
+OSPF
+~~~~
+ - Dijkstra: use Fibonacci heaps?
+ - point-to-point interface with address: advertise as stub network
+ - static routes: stub networks?
+ - modes: PtP, PtP-unnumbered, Broadcast, NBMA, point-to-multipoint
+ - importing of device routes for networks where we don't run OSPF
+ - tie breaking for equal type 2 ext metrics by using internal (type 1) metric
+ - SPF tree recalc timing (per-area timers?)
+ - aggregation: specify network list for each area
+ - stub area: either no external routes or only default route
+ - automatic generation of external route tags (RFC1403)
- To prevent this, an implementation of OSPF SHOULD invoke
- the calculation in Section 16.3 of [ROUTE:1] whenever any
- part of the path to the destination is a virtual link (the
- specification only says this is necessary when the first
- hop is a virtual link).
BGP
~~~
-- BGP:
- in, local, out RIB
- maxsize=4096
- BGP identifier aka router id
- - removal of loops
+ - detection of loops
- aggregation, ATOMIC_AGGREGATE
- communities
- confederations
@@ -71,73 +83,4 @@ BGP
- expected neighbor AS
- hold time
- idle timer after error: initial value, exponential growth, maximum value
-
-- address testing macros (ALL_ZEROS)
-- all internal tables are in network order (?)
-- logging of errors and debug dumps
-- filter: logging of dropped routes (?)
-- limitation of memory consumption: per-process and total
-- alloca
-- precedence of all packets (incl. TCP)
-- adding of route: clear all bits not covered by masklen
-- switch: generate default route only if at least one BGP connection exists
-
-- route update: new, change, remove
-- route recalculation timing
-
-- CONFIG_TOS
-- CONFIG_MULTIPATH
-
-- reconfiguration without restart of all protocols?
-- change of interface address: ??? (down and up?)
-- "generate default route" switch for all IGP's
-
-- RIPv2:
- - Route Tag
- - limit routing table xfer (frequency, only to neighbors)
- - multicast on/off
- - remember routes for all neighbors?
-
-- BGP:
- import of IGP routes (use external route tags from OSPF)
-
-- Interface:
- - RIP metric
- - multicast capability flag
- - MTU
- - OSPF metrics (per-TOS)
-
-- running protocol on an interface:
- - interface is not required to exist
- - can specify a wildcard pattern or an interface list
-
-- preferences:
- - directly connected
- - static
- - OSPF internal, OSPF ext type 1 (comparable metrics), OSPF inter-area
- - RIP
- - BGP
- - OSPF ext type 2
- - sink
-
-- lib:
- - MD5
-
-- OSPF:
- - Dijkstra: use Fibonacci heaps?
- - point-to-point interface with address: advertise as stub network
- - static routes: stub networks?
- - modes: PtP, PtP-unnumbered, Broadcast, NBMA, point-to-multipoint
- - importing of device routes for networks where we don't run OSPF
- - tie breaking for equal type 2 ext metrics by using internal (type 1) metric
- - SPF tree recalc timing (per-area timers?)
- - aggregation: specify network list for each area
- - stub area: either no external routes or only default route
- - automatic generation of external route tags (RFC1403) -- what about
- using the same rule for RIPv2? [shared code?]
-
-- timers - one-shot and periodic, resolution 1 sec, randomized
-- re-configuration: restart of routing protocols (shutdown mode)
-- route: originating AS
-
-- Check incoming packets and log errors!!