IOS: Parsing for track ip command

[ratulm]

Fixes #6347

[batfish-bot]

This change is 

[codecov]

Codecov Report

Merging #6378 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #6378      +/-   ##
============================================
- Coverage     73.05%   73.03%   -0.02%     
+ Complexity    35180    35170      -10     
============================================
  Files          2815     2815              
  Lines        142704   142704              
  Branches      17171    17171              
============================================
- Hits         104248   104225      -23     
- Misses        30215    30230      +15     
- Partials       8241     8249       +8     

Impacted Files	Coverage Δ	Complexity Δ
...g/batfish/datamodel/flow/IncomingSessionScope.java	84.61% <0.00%> (-15.39%)	7.00% <0.00%> (-1.00%)
...rg/batfish/identifiers/StorageBasedIdResolver.java	85.29% <0.00%> (-5.89%)	22.00% <0.00%> (ø%)
.../org/batfish/dataplane/rib/RouteAdvertisement.java	83.67% <0.00%> (-4.09%)	18.00% <0.00%> (-1.00%)
...col/src/main/java/org/batfish/role/InferRoles.java	89.54% <0.00%> (-1.37%)	50.00% <0.00%> (-1.00%)
...src/main/java/org/batfish/coordinator/PoolMgr.java	59.52% <0.00%> (-1.20%)	15.00% <0.00%> (-1.00%)
...ain/java/org/batfish/storage/FileBasedStorage.java	86.19% <0.00%> (-0.55%)	249.00% <0.00%> (ø%)
...src/main/java/org/batfish/coordinator/WorkMgr.java	75.60% <0.00%> (-0.47%)	245.00% <0.00%> (-2.00%)
...java/org/batfish/dataplane/ibdp/VirtualRouter.java	90.54% <0.00%> (-0.34%)	208.00% <0.00%> (-1.00%)
...a/org/batfish/representation/aws/LoadBalancer.java	82.18% <0.00%> (-0.32%)	70.00% <0.00%> (-1.00%)

[arifogel]

Reviewed 3 of 3 files at r1.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @ratulm)

---

projects/batfish/src/main/antlr4/org/batfish/grammar/cisco/CiscoParser.g4, line 4073 at r1 (raw file):

:
  (
    DEFAULT

Test for this alternative please.

[arifogel]

Reviewed 1 of 1 files at r2.
Reviewable status: complete! all files reviewed, all discussions resolved