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tools: Fix frr-reload for ebgp-multihop TTL reconfiguration.

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In ebgp-multihop, there is a difference in reload behavior when TTL is
unspecified (meaning default 255) and when 255 is explicitly specified.
For example, when reloading with 'neighbor <neighbor> ebgp-multihop
255' in the config, the following difference is created. This commit
fixes that.

    Lines To Delete
    ===============
    router bgp 65001
     no neighbor 10.0.0.4 ebgp-multihop
    exit

    Lines To Add
    ============
    router bgp 65001
     neighbor 10.0.0.4 ebgp-multihop 255
    exit

The commit 767aaa3a80 is not sufficient and frr-reload needs to be
fixed to handle both unspecified and specified cases.

Signed-off-by: Nobuhiro MIKI <nob@bobuhiro11.net>
(cherry picked from commit 594e917656)
This commit is contained in:
Nobuhiro MIKI 2025-01-29 04:31:53 +00:00 committed by Mergify
parent 75991d68a1
commit 06ce47558f
1 changed files with 11 additions and 0 deletions
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11
tools/frr-reload.py
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@ -237,6 +237,14 @@ def get_normalized_interface_vrf(line):
return line
def get_normalized_ebgp_multihop_line(line):
obj = re.search(r"(.*)ebgp-multihop\s+255", line)
if obj:
line = obj.group(1) + "ebgp-multihop"
return line
# This dictionary contains a tree of all commands that we know start a
# new multi-line context. All other commands are treated either as
# commands inside a multi-line context or as single-line contexts. This
@ -319,6 +327,9 @@ class Config(object):
if ":" in line:
line = get_normalized_mac_ip_line(line)
if "ebgp-multihop" in line:
line = get_normalized_ebgp_multihop_line(line)
# vrf static routes can be added in two ways. The old way is:
#
# "ip route x.x.x.x/x y.y.y.y vrf <vrfname>"